3 years ago

Please help !!!!!!!!

Mathematics

2 answers:

abruzzese [7]3 years ago

7 0

Answer:

3. x = 40.75°

4. 8

Step-by-step explanation:

3. the sum of the interior angles in a triangle is 180°

x + x + 98.5 = 180

to find x:

x + x + 98.5 = 180

2x = 180 - 98.5

2x = 81.5

x = 81.5/2

x = 40.75

4. in the in isosceles triangle the base angles are equal

3x + 4 = x + 8

to find x:

3x + 4 = x + 8

3x - x = 8 - 4

2x = 4

x = 4/2

x = 2

so the length of the base is 2*2 + 4 = 8

Ulleksa [173]3 years ago

3 0

1. 72

don't know the others

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