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morpeh [17]
3 years ago
7

7. Test your knowledge of lines with the following:

Mathematics
2 answers:
IRINA_888 [86]3 years ago
8 0

Answer:

Step-by-step explanation:

melamori03 [73]3 years ago
3 0

a. Neither; 12° + 68° = 80°

b. Supplementary; 95° + 85° = 180°

c. Neither; 43° + 48° = 91°

d. Complementary; 70° + 20° = 90°

a. 140º

b. 105º

c. 60º

a. ∠1 = ∠AEB or ∠BEA

b. ∠2 = ∠BEC or ∠CEB

c. ∠3 = ∠CED or ∠DEC

d. ∠4 = ∠DEA or ∠AED

a. Right

b. Straight

c. Obtuse

d. Acute

a. Adjacent

b. Adjacent

c. Vertical

d. Vertical

a. perpendicular

b. parallel

c. perpendicular

d. neither

a. Yes, the lines are parallel. The rectangles create an optical illusion that makes the lines appear to be crooked.

b. Yes, the lines (3rd and 4th in diagram) are parallel. To show this is true, place two rulers or straightedges along the lines. You’ll then see that they’re parallel.

Step-by-step explanation:

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Answer:

See below.

Step-by-step explanation:

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3 years ago
Someone please help with 4-6?
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The curved urface area of a cone i 140π cm2. What will be the radiu of a cone whoe lant height i 5 cm
VashaNatasha [74]

The radius of a cone with a curved surface area of 140π cm² and a slant height of 5 cm will be 28 cm.

<h3>What is curved surface area?</h3>

The region with just curved surfaces, leaving the circular top and base, is referred to as the curved surface area. Total Surface Area is the combined area of the bases and the curved surface. The measurement of a solid's curved surface area is its outer area, which excludes the top and bottom extensions. Surface area of the cylinder that is curved: A right circular cylinder is the solid that results when a rectangle circles around one side and makes a full revolution. The curved surface area of a cylinder (CSA) is also known as the lateral surface area and is defined as the area of the curved surface of any given cylinder having a base radius "r" and height "h".

Here,

Curved surface area of cone=πrl

=140π

l=5 cm

140π=πr*5

r=140/5

r=28 cm

The radius of cone that has 5 cm as slant height and 140π cm² as the curved surface area will be 28 cm.

To know more about curved surface area,

brainly.com/question/1037971

#SPJ4

7 0
2 years ago
Without graphing, tell whether the point (10, 37) is on the graph of y = 3x + 7.
slava [35]

Answer: YES

Plug in the numbers in your head.

y=3(10)+7

y=30+7

y=37 which is the y intercept

7 0
3 years ago
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