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3 years ago

WILL GIVE BRAINIEST

Mathematics

2 answers:

Aleksandr-060686 [28]3 years ago

7 0

Answer:

45.5

Step-by-step explanation:

Angles B and C are equal because it is an isosceles triangle.

This means that 180 = (2x+4) + 2(3x+5)

Then just solve for x

180 = 2x+4+6x+10

180 = 8x+14

166 = 8x

x = 20.75

Now plug this into a

A = 2(20.75)+4

A = 45.5

You can check this buy plugging it into B

3(20.75)+5

B = 67.25

C = B, so C = 67.25

B + C + A = 180

67.25 + 67.25 + 45.5 = 180

134.5+45.5 = 180

180 = 180

Katarina [22]3 years ago

4 0

<h2>Answer:</h2>

<h2>Step-by-step explanation:</h2>

Angles B and C are equal because it is an isosceles triangle.

This means that 180 = (2x+4) + 2(3x+5)

Then just solve for x

180 = 2x+4+6x+10

180 = 8x+14

166 = 8x

x = 20.75

Now plug this into a

A = 2(20.75)+4

A = 45.5

You can check this buy plugging it into B

3(20.75)+5

B = 67.25

C = B, so C = 67.25

B + C + A = 180

67.25 + 67.25 + 45.5 = 180

134.5+45.5 = 180

180 = 180

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