Geometry FFR 2017
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Which Triangle(s) is/are similar to ABC? A. DEF B. RST C. Neither D. Both
A. DEF
Find the midpoint of (3,6) and (-8, 3).
(4+x/2 , 5+y/2) = (2,2) so...
What is the m∠ABC?
2x + 1 + 3x - 31 = 180 5x - 30 = 180 + 30 + 30 5x = 210 x = 42 2(42)+1 = 85 degrees
Know definition and recognize how to use supplementary and complementary angles. For example: If an angle is 40 degrees, what would the complement be? What is the supplement?
Complementary = 90 Complementary = 50 degrees Supplementary = 180 Supplementary = 140 degrees
Solve for x.
x - 6 + 9 + 2x - 19 = 23 3x - 16 = 23 + 16 + 16 3x = 39 x = 13