Question

abc is an isosceles triangle with ab=ac if a=70 then find b

Answer 1

Answer:

b= c

Step-by-step explanation:

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Answer 2

Answer:

• The required measure of ∠B = 55°

Given:

• ∆ABC is isosceles with AB = AC.
• ∠A = 70°

Need to find:

• The required measure of ∠B = ?

Solution:

Since ∆ABC is isosceles with AB = AC

• ∠B = ∠C [Angle opposite to equal sides of a triangle are equal]

By angle sum property, We have:-

• ∠A + ∠B + ∠C = 180°

➜ 70 + ∠B + ∠B = 180°

• [ ∠A = 70° given, ∠B = ∠C ]

➜ 2∠B = 180° - 70°

➜ 2∠B = 110°

➜ ∠B = 110°/2

➜ ∠B = 55°

Therefore:

• The required measure of ∠B is 55°.

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