Mathematics for IGCSE & O level - Angles (Section 2 - No. 46)
If two lines intersect, forming four angles. Two of these angles measure 45° and 135°. What can we say about the other two angles?
One is 45°, the other 90°
Both are 135°
One is 135°, the other is 90°
Both are 45°
คำอธิบาย
Vertically opposite angles are equal, and the angles add up to 360°. Therefore, both are 135°