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SAT-MATH/U4/Lines, Angles, and Triangles/sat-math-geo2-049

Lines, Angles, and Triangles

SAT Math· difficulty 3/5

What is the measure of one interior angle of a regular octagon?

  • A

    120°120°120°

  • B

    140°140°140°

  • C

    144°144°144°

  • D

    135°135°135°

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Explanation

180(8−2)8=10808=135°\frac{180(8-2)}{8}=\frac{1080}{8}=135°8180(8−2)​=81080​=135°.

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