Answer: 30 degrees ---- Explanation: Let x be the angle. 4x=2(90-x) is the equation that says what you are asking. So we simplify and have 4x=180-2x 6x=180 x=30 Let's check 4x30=120 The complement of 30 is 60, and 2x60=120 so it works!
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40 degres
72
180-x= 2(90+x) - 60 180-x=180+2x - 60 -x=-60 x=60 Are you in my honors geometry class? The algebra is wrong. the third line should read -3x=-60 x=20 therefore the complement is 70o This agrees with the answer in the back of the book.
1st angle = 30 degrees 2nd angle = 60 degrees
a + b = 90, ie a = 90 - b;a = 2b - 36 so 2b - 36 = 90 - b ie 3b = 126 so b = 42 and a = 48 (which is 36 less than 84)