IXL | Find missing angles in triangles

The diagram shows a triangle.

75°

38°

What is the value of

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Learn with an example

The diagram shows a triangle.

62°

80°

What is the value of

The sum of the interior angle measures of a triangle is 180°.

First, look at the interior angle measures in the triangle.

Set the sum of the interior angle measures of the triangle equal to 180°. Solve for

62°

80°

180°

142°

Combine like terms

180°

Combine like terms

Subtract 142° from both sides

38°

Subtract 142° from both sides

So,

38°

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