(a) Construct a quadrilateral (a four-sided figure) and measure the four interior angles with a protractor. What...

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(a) Construct a quadrilateral (a four-sided figure) and measure the four interior angles with a protractor. What is the sum of the measures?

(b) Construct three other quadrilaterals, measure the  angles, and record the sums. Are your answers the same?

(c) Make a conjecture about the sum of the measures of the four interior angles of a quadrilateral.

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A Survey of Mathematics with Applications

ISBN: 978-0134112107

10th edition

Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde

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