Why do angles in a triangle add to 180?
We know that angles on a straight line add to 180 degrees. Now imagine you have a triangle and the angles are called A, B and C.
We can orientate the triangles so that we form a straight line. We can see that A, B and C lie on a straight line, so A+B+C=180.
AK
Related Maths GCSE answers
All answers ▸What is the fraction of blue beads?
Peter is 180cm tall, correct to 2 significant figures. Alice is 150cm tall, correct to 2 significant figures. What is the upper and lower bound of the difference in their heights?
Nadia has £5 to buy pencils and rulers. Pencils are 8p each. Rulers are 30p each. She says “I will buy 15 pencils. Then I will buy as many rulers as possible. With my change I will buy more pencils.” How many pencils and how many rulers does she buy?
Expand and simplify (x − 4)(2x + 3y)^2