Question

if angle a =30° b = 70° then exterior angle formed by producing bc is equal to​

Answer 1

Step-by-step explanation:

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Answer 2

Given:

• ∠a = 30°
• ∠b = 70°

To Find:

• The value of exterior angle formed by producing bc.

Solution:

The exterior angle formed by producing bc is ∠c.

We should find the value of ∠c.

We know that,

∠a+∠b+∠c = 180°  → equation 1 { exterior angle property of triangles}

Substitute the values from the given data in equation 1. we get,

⇒ 30°+70°+∠c = 180° { adding the terms in LHS}

⇒ ∠c = 180° - 100° { shifting the terms from LHS to RHS and subtracting the same}

⇒ ∠c = 80°

∴ The value of exterior angle formed by producing bc = 80°