Angle BCD = 55°. Find the area of the parallelogram. Question 6: Prove the area of any triangle is given by the formula A = ½abSinC.

Free Area of a Triangle GCSE maths revision guide including step by step examples, and free area of a triangle worksheets and exam questions.

The area of a triangle is 280 square feet. The triangle has two sides of 28 feet and 24 feet with an included obtuse angle. Find the measure of the obtuse angle ...

Information. • The marks for each question are shown in brackets. – use this as a guide as to how much time to spend on each question.

Practice questions. 1. Work out the area of each triangle. Give your answers correct to 3 significant figures. a b c. 2. The area of triangle XYZ is 13.3 cm2.

Trigonometry can be used to find the area of a triangle when you know the length of two sides and the included angle.

C1 The area of the triangle is 16.5 cm2. The angle xº is acute. Find the value of x. C2 The area of the triangle is 20 cm2.

The area of a triangle equals ½ the length of one side times the height drawn to that side (or an extension of that side). General Formula for Area of Triangle:

Example 5 (calculator) A triangle of area 50 cm2 has two sides with lengths 12 cm and 10 cm. The angle between these two sides is acute. Calculate this angle.

Sine, Cosine Rule & Area of Triangles (CIE IGCSE Maths: Extended) Exam Questions 5 hours 46 questions Download All answers Medium Hard Very Hard