Worked Example
Part of Area of Triangle (Trig) · GCSE GCSE Mathematics revision
This study notes covers Worked Example within Area of Triangle (Trig) for GCSE Mathematics. Revise Area of Triangle (Trig) in Geometry & Measures for GCSE Mathematics with 12 exam-style questions and 2 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 3 of 4 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 3 of 4
Practice
12 questions
Recall
2 flashcards
Worked Example
Find the area of a triangle with sides 6cm and 8cm and an included angle of 45°.
Solution
Area = (1/2) × 6 × 8 × sin 45°
Area = 24 × (√2/2) = 12√2
Area = 16.97 cm² (2 d.p.)
Keep building this topic
Read this section alongside the surrounding pages in Area of Triangle (Trig). That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Area of Triangle (Trig)
What is the trigonometric formula for the area of a triangle with sides a and b and included angle C?
Starting from Area = ½ × base × height, show how to derive the formula Area = ½ab sinC.
Quick Recall Flashcards
12 questions on Area of Triangle (Trig) — practise free
Instant marking, adaptive difficulty, and 2 spaced repetition flashcards. Free until your GCSEs.
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