Answer: choice A) x = 60, y = 30
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Focus on the smaller triangle on the left side. This is an equilateral triangle with all angles the same measure. So we have three angles each x degrees. They add to x+x+x = 3x. Set this equal to 180 (all angles of any triangle add to 180) and solve
3x = 180
x = 180/3
x = 60
Since all three angles of that triangle are each 60 degrees, this means that the base angle of the smaller triangle on the left is y = 90 - x = 90 - 60 = 30.
Put another way, x+y = 60+30 = 90 because the angles x and y form the 90 degree right angle. See the attached image for more info.
note: the triangle on the right side is an isosceles triangle. The base angles are congruent, and these angles are opposite the congruent sides (marked with the tickmarks).
Answer:
4 units
Step-by-step explanation:
volume of cube = 64 cubic units
Answer:
9.9
Step-by-step explanation:
1+3+3+5+9+11+13+13+20+21=99 99/10=9.9
Answer:
x=70
Step-by-step explanation:
when added together, verticle angles equal 180 degrees.
2x-10+x+20=180
3x-10+20=180
3x-30=180
3x=210
x=70
Marc is 12
Using david’s age we can find what marc’s age is from three years ago by working backwards.
26-8= 18
18/2 = 9
Three years ago marc was 9 so now he is 12 (since 9+3 = 12)