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Soloha48 [4]
3 years ago
12

Help me please!!!!!!!!!!! :)

Mathematics
1 answer:
svet-max [94.6K]3 years ago
7 0

Answer:

b= 70

Step-by-step explanation:

The sum of the opposite interior angles of a triangle is equal to exterior angle.

a+b = 140

We know that a = b since PQ = RQ  The angles opposite the equal sides in an isosceles triangle are equal

b+b = 140

2b =140

Divide by 2

2b/2 =140/2

b= 70

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