|-45 + 63| + |10| - |27|
=|+18| + |10| - |27|
=18 + 10 - 27
= 28 - 27
= 1 [1 mark]
If 27:a=63:84, the value of a is
Identify which of the following pairs of angles are complementary and which are supplementary.
(i) 65°, 115° (ii) 63°, 27°
(iii) 112°, 68° (iv) 130°, 50°
(v) 45°, 45° (vi) 80°, 10°