Triangle DEF is given by the points D(1, 1), E(3, 8), and F(8, 0). Select True or False for each statement. A. The area of △DEF is 25.5 square units.
A True B False
B. △DEF is a scalene triangle.
A True B False
C. The area of △DEF is 30 units.
A True B False

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answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

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step-by-step explanation: