Question

50 POINTS!!! The measures of the angles of a triangle are shown in the figure below. Solve for x.

Answer 1

Note that:

• 7x + 16 + 39 + 90 = 180

Simplify the equation:

• 7x + 16 + 39 + 90 = 180
• => 7x + 145 = 180
• => 7x = 35
• => x = 35/7 = 5

Answer 2

x = 5

Explanation:

Add all of the angles together. We know that the third one is 90° because it is a right triangle and the little square indicates a 90° angle.

7x + 16 + 39 + 90 = 180

Simply.

7x + 145 = 180

-145 -145

7x = 35

/7 /7

x = 5

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