The first part is to find the length SQ which is equal to SP. Use the sine rule. SQ/sin 65 = (SQ - 1)/Sin50 (sin50)/(sin 65) = (SQ-1)/SQ 0.8452(SQ) = SQ-1 0.1547SQ = 1 SQ = 6.46 The formula to apply here is: Area=1/2(SQ)(SQ)sin50 = 0.5 × 6.46 × 6.46 × sin50 = 15.984