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CN NA. CM MB. =. Side-Splitter Theorem. 12 y. 10 6. =. Substitute. 10 y = 72. Cross-Product Property. y = 7.2. Solve for y. Proportions in Triangles. LESSON 7-5. Additional Examples. Find y . . Quick Check. Because RSTU is a trapezoid, RS || UT . . 6 x. 5
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CN NA CM MB = Side-Splitter Theorem 12 y 10 6 = Substitute. 10y = 72 Cross-Product Property y = 7.2 Solve for y. Proportions in Triangles LESSON 7-5 Additional Examples Find y. Quick Check
Because RSTU is a trapezoid, RS || UT. 6 x 5 12.5 Corollary to the Side-Splitter Theorem = 5x = 75 Cross-Product Property x = 15 Solve for x. x 9 12.5 y Corollary to the Side-Splitter Theorem = 15 9 12.5 y Substitute 15 for x. = 15y = 112.5 Cross-Products Property y = 7.5 Solve for y. Proportions in Triangles LESSON 7-5 Additional Examples The segments joining the sides of trapezoid RSTU are parallel to its bases. Find x and y. Quick Check x = 15 and y = 7.5.
IG GH IK HK = Triangle-Angle-Bisector Theorem 24 40 x 30 = Substitute. 24 40 (30) = x Solve for x. Proportions in Triangles LESSON 7-5 Additional Examples Find the value of x. x = 18 Quick Check