दो समानांतर रेखाओं को एक तिर्यक रेखा द्वारा काटने पर बने दो संगत कोण (corresponding angles) x और 70° हैं। तो, 4x - 30° का मान क्या है?

In a geometric figure, parallel lines AB || CD and CD || EF are given. If ∠AJI = 129°, ∠EFD = 37°, and line DF is parallel to line CH, then find the measure of ∠GCI.

Two supplementary angles are in the ratio 1 : 2. Calculate the measure of the smaller angle.

Two complementary angles differ by 8°. Find the angles.