Learn about complementary, supplementary, corresponding, alternate and vertically opposite angles with BBC BItesize Scotland maths for Third Level CfE.

Vertically opposite angles are equal, so angle 𝒙 = 140°. Angle 𝒚 and 70° are adjacent angles on a straight line. Adjacent angles on a straight line add up to 180°, so angle 𝒚 = 110° .

2. Sum of two angles of a triangle is 90 o and their difference is 50 o. Find all the angles of the triangle. 3. Prove that vertically opposite are equal. 4. The angles of a triangle are in the ...