
Jon S. answered 10/31/20
Patient and Knowledgeable Math and English Tutor
The sum of the interior angles of triangle JKL will add up to 180 degrees
so <J + <K + <L - 180
L = measure of angle L
J = measure of angle J = L - 7
K = measure of angle K = 2L - 21
so L + L-7 + 2L - 21 = 180
4L - 28 = 180
4L = 208
L = 52
J = L - 7 = 52 - 7 = 45
K = 2L - 21 = 2(52) - 21 = 83