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3 years ago

The diameter of a circle is 4 cm. Which equation can be used to find its circumference?

Mathematics

2 answers:

Sonbull [250]3 years ago

7 0

C= pie times r squared

earnstyle [38]3 years ago

3 0

Answer:

the second one

Step-by-step explanation:

the second one because if the diameter is half which is ×2 than the full circumference is ×4

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Solve the triangle that has a=4.6, B=19°, A=92° (picture provided)

kolezko [41]

Answer:

Option b

Step-by-step explanation:

To solve this problem use the law of the sines.

We have 2 angles of the triangle and one of the sides.

$a = 4.6\\B = 19\°\\A = 92\°\\C = 180 -A - B\\C = 180 - 92 - 19\\C = 69\°$

The law of the sines is:

$\frac{sin(A)}{a} = \frac{sin(B)}{b} = \frac{sin(C)}{c}$

Then:

$\frac{sin(92)}{4.6} = \frac{sin(19)}{b}\\\\b = \frac{sin(19)}{\frac{sin(92)}{4.6}}\\\\b = 1.5$

$\frac{sin(B)}{b} = \frac{sin(C)}{c}\\\\\frac{sin(19)}{1.5} = \frac{sin(69)}{c}\\\\c = \frac{sin(69)}{\frac{sin(19)}{1.5}}\\\\c = 4.30$

8 0

2 years ago

A triangle has two sides that measure 10 in. and 8 in. which could be the measure of the third side?

valkas [14]

If the triangle has a right angle, the measure of the third side is 12.8 inches

5 0

3 years ago

Read 2 more answers

PLZ HELP IVE BEEN STUCK ON THIS QUESTION

o-na [289]

Answer:

A= 16

B=?

Step-by-step explanation: srry about the second one im also confused but i tried my best.

7 0

3 years ago

Draw the image of ABC under a dilation whose center is P and scale factor is 1/3

viktelen [127]

Answer:

THE FIRST OPTION

Step-by-step explanation:

3 0

3 years ago

Approximately how long is a leg of an isosceles right triangle that has a hypotenuse of length 11.31

Lapatulllka [165]

Answer:

Leg of an isosceles right triangle is 7.99 long.

Step-by-step explanation:

Given:

Length of the hypotenuse =11.31

To find:

Length of the leg of an isosceles right triangle =?

Solution:

According to Pythagorean's Theorem, we have

$a^2 +b^2 = c^2$ -----------------------------(1)

Here were are given as isosceles triangle, so the two sides will be of same length

So equation 1 can be rewritten as

$a^2 +a^2 = c^2$

$2a^2 = c^2$

Substituting the value of hypotenuse

$2a^2 = (11.31)^2$

$2a^2 = 127.91$

$a^2 = \frac{127.91}{2}$

$a^2 =63.955$

$a = \sqrt{63.955}$

a = 7.99

7 0

2 years ago