Question

one angle of a triangle is 20 degrees. The second angle is four times the third. what is the measurement of the third angle?

Answer 1

Let the third angle be x degrees.
Now since the 3 angles of a triangle add up to 180 degrees we can create an equation
(the measure of the second angle will be 4 times x):-

x + 4x + 20 = 180

Answer 2

Solving for x gives you the measure of the third angle.

Answer 3

OK?

Answer 4

@welshfella yes! Thank you !

Answer 5

yw