in triangle abc angle B 90 degree a b 20 cm and BC 21 cm find a AC
Answers
Answered by
5
Given - Angle and length of side AB and BC
Find - Length of side AC
Solution - The length of the side AC is 29 centimetres.
The presence of angle B as 90° indicates that the angle is a right-angled triangle. Now, to calculate the length AC, the Pythagoras theorem will be applied.
AB² + BC² = AC²
AC² = 20² + 21²
Taking square of the numbers.
AC² = 400 + 441
Performing addition.
AC² = 841
Taking square root of the number.
AC = 29 centimetres
Hence, the length of the side AC is 29 centimetres.
Similar questions