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CaHeK987 [17]
3 years ago
8

The perimeter of an isosceles triangle is 12a + 8b

Mathematics
1 answer:
n200080 [17]3 years ago
5 0
(12a + 8b) - (2a - 4b)
12a + 8b - 2a + 4b
10a + 12b

(10a + 12b)/2
5a + 6b
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boyakko [2]

a. a=40° (alternate interior angles)

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c= d= 140°( vertically opposite angles)

d=b=140°( corresponding angles)

b. 2a+120°=180° (supplementary angles)

2a=60°

a=30°

c. a+110°=180°( supplementary angles)

a=70°

b+70°=180°( supplementary angles)

b=110°

c+110°=180°( supplementary angles)

c=70°

c=d=70( corresponding angles)

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Answer:

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