IXL | Find missing angles in triangles

The diagram shows a triangle.

50°

88°

What is the value of

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Learn with an example

The diagram shows a triangle.

39°

55°

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

39°

55°

180°

94°

Combine like terms

180°

Combine like terms

Subtract 94° from both sides

86°

Subtract 94° from both sides

So,

86°

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