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2 years ago

Compare the original figure to the enlarged figure.

Mathematics

2 answers:

astra-53 [7]2 years ago

8 0

Answer:

All the options are correct apart from the last one

Step-by-step explanation:

Scale factor is the ratio of corresponding sides

Scale factor = 6.5 / 3.25

Yes

Scale factor = 3.25 / 6.5

Yes

Scale factor = 3 / 1.5

Yes

Scale factor = 1.5 /3

Yes

Scale factor = 1.5 / 3.25

No, as it is the ratio of sides of the same rectangle

11Alexandr11 [23.1K]2 years ago

4 0

Answer:Which ratios can be used to find the scale factor? Check all that apply.

yes!!!Scale factor = StartFraction enlarged over original EndFraction = StartFraction 6.5 over 3.25 EndFraction

NO!!Scale factor = StartFraction enlarged over original EndFraction = StartFraction 3.25 over 6.5 EndFraction

Yes!!!Scale factor = StartFraction enlarged over original EndFraction = StartFraction 3 over 1.5 EndFraction

Scale factor = StartFraction enlarged over original EndFraction = StartFraction 1.5 over 3 EndFraction

Scale factor = StartFraction enlarged over original EndFraction = StartFraction 1.5 over 3.25 EndFraction

Step-by-step explanation:

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Three more than twice some number

olya-2409 [2.1K]

Answer:

2x + 3

Step-by-step explanation:

Let's call the number x

twice a number is 2 times the number, or in this case 2x

3 more than 2x is 2x + 3

If my answer is incorrect, pls correct me!

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-Chetan K

7 0

2 years ago

(8x +6) = (8x +6) = 8x= x =

dem82 [27]

Step-by-step explanation:

8x +6° +118° = 180° ( linear pair)

=> 8x = 180°-124°

=> 8x = 56°

=> x = 7°

hope this helps you.

7 0

2 years ago

One card is selected at random from a deck of cards. Determine the probability that the card selected is a 10. The probability t

Daniel [21]

Answer:

1:13

Step-by-step explanation:

A standard deck has 52 cards not including the joker. each suit has one 10. there are total four "10" in a deck of playing cards. 4/52 = 1/13 or 1:13

6 0

2 years ago

Read 2 more answers

F(x)= 2x +6 , vertical shrink by a factor of 1/2

Andrew [12]

Answer:

g(x) = x+3.

Step-by-step explanation:

i hope this helps :D

5 0

3 years ago

You work at a pioneer historical site. On this site you have handcarts. One cart has a handle that connects to the center of the

Gelneren [198K]

Answer:

a) see below

b) radius = 16.4 in (1 d.p.)

c) 18°. Yes contents will remain. No, handle will not rest on the ground.

d) Yes contents would spill. Max height of handle = 32.8 in (1 d.p.)

Step-by-step explanation:

Part a

A chord is a line segment with endpoints on the circumference of the circle.

The diameter is a chord that passes through the center of a circle.

Therefore, the spokes passing through the center of the wheel are congruent chords.

The spokes on the wheel represent the radii of the circle. Spokes on a wheel are usually evenly spaced, therefore the congruent central angles are the angles formed when two spokes meet at the center of the wheel.

Part b

The tangent of a circle is always perpendicular to the radius.

The tangent to the wheel touches the wheel at point B on the diagram. The radius is at a right angle to this tangent. Therefore, we can model this as a right triangle and use the tan trigonometric ratio to calculate the radius of the wheel (see attached diagram 1).

$\sf \tan(\theta)=\dfrac{O}{A}$

where:

$\theta$ is the angle
O is the side opposite the angle
A is the side adjacent the angle

Given:

$\theta$ = 20°
O = radius (r)
A = 45 in

Substituting the given values into the tan trig ratio:

$\implies \sf \tan(20^{\circ})=\dfrac{r}{45}$

$\implies \sf r=45\tan(20^{\circ})$

$\implies \sf r=16.37866054...$

Therefore, the radius is 16.4 in (1 d.p.).

Part c

The measure of an angle formed by a secant and a tangent from a point outside the circle is half the difference of the measures of the intercepted arcs.

If the measure of the arc AB was changed to 72°, then the other intercepted arc would be 180° - 72° = 108° (since AC is the diameter).

$\implies \sf new\: angle=\dfrac{108^{\circ}-72^{\circ}}{2}=18^{\circ}$

As the handle of the cart needs to be no more than 20° with the ground for the contents not to spill out, the contents will remain in the handcart at an angle of 18°.

The handle will not rest of the ground (see attached diagram 2).

Part d

This can be modeled as a right triangle (see diagram 3), with:

height = (48 - r) in
hypotenuse ≈ 48 in

Use the sin trig ratio to find the angle the handle makes with the horizontal:

$\implies \sf \sin (\theta)=\dfrac{O}{H}$

$\implies \sf \sin (\theta)=\dfrac{48-r}{48}$

$\implies \sf \sin (\theta)=\dfrac{48-45\tan(20^{\circ})}{48}$

$\implies \theta = 41.2^{\circ}\:\sf(1\:d.p.)$

As 41.2° > 20° the contents will spill out the back.

To find the maximum height of the handle from the ground before the contents start spilling out, find the height from center of the wheel (setting the angle to its maximum of 20°):

$\implies \sin(20^{\circ})=\dfrac{h}{48}$

$\implies h=48\sin(20^{\circ})$

Then add it to the radius:

$\implies \sf max\:height=48\sin(20^{\circ})+45\tan(20^{\circ})=32.8\:in\:(1\:d.p.)$

(see diagram 4)

------------------------------------------------------------------------------------------

Circle Theorem vocabulary

Secant: a straight line that intersects a circle at two points.

Arc: the curve between two points on the circumference of a circle

Intercepted arc: the curve between the two points where two chords or line segments (that meet at one point on the other side of the circle) intercept the circumference of a circle.

Tangent: a straight line that touches a circle at only one point.

7 0

2 years ago