Question

What is the Value of x in the triangle

Answer 1

x = 50

Explanation:

80 + x + x = 180

80 + 2x = 180

2x = 100

x = 50

Answer 2

• x = 50

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The triangle is isosceles since two sides have same length of 7 units.

The angles opposite to equal sides are congruent, so the missing angle is also x degrees.

Use the triangle sum:

• 2x + 80 = 180
• 2x = 100
• x = 50