0580/13 May/Jun 2023, Question 12: Angles in a Triangle
Cambridge IGCSE Mathematics 0580 · Paper 13 (Core) · Calculator · 2 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
In isosceles triangle ABC, AB = AC and angle BAC = 38°. Find the value of x, the angle at B.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 2 marks
- 1Base angles of an isosceles triangle are equal
- 2x = (180 − 38) ÷ 2
- 3x = 142 ÷ 2 = 71
Answer71
Stuck on a step? Read the free lesson: Angles in a Triangle
Practise more angles in a triangle questions
Real 0580 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on angles in a triangle
Also searched as: 0580/13/M/J/23 · 0580_s23_qp_13 · 0580 s23 13 · question 12.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.