Answer: m∠D = 65°
Step-by-step explanation:
The best solve method for problems like this is say the sum of the angle values equals 360.
2x-15+2x-15+x+x = 360
Then from here you just simplify.
4x+2x-30 = 360
6x = 390
x = 65
So the measure of Angle D equals 65 degrees.
We know, sum of all angles of a quadrilateral is 360°.
Therefore, angle A + angle B + angle C + angle D = 360°
or, (2x-15)+x+(2x-15)+x = 360
or, 6x-30 = 360
or, 6x = 360+30
or, 6x = 390
or, x = 390/6 = 65
Therefore, measure of angle D = x° = 65°
The answer is option d. 65°
Answer:
Hope this will help you.
