Find a missing side: round to the nearest tenth
Use a² + b² = c² and solve for the missing leg: subtract the known leg squared from the hypotenuse squared.
Loading a question…
You've done today's 10 free questions.
Come back tomorrow for 10 more, or get unlimited practice with a membership.
Want more today? Print 20 more questions free, with the answers.
Already a member? Sign in.
See worked examples
A right triangle has legs of 11 cm and 5 cm. How long is the hypotenuse, in cm? Round to the nearest tenth.
Answer: 12.1
A right triangle has a hypotenuse of 7 km and one leg of 2 km. How long is the other leg, in km? Round to the nearest tenth.
Answer: 6.7
A right triangle has a hypotenuse of 10 m and one leg of 2 m. How long is the other leg, in m? Round to the nearest tenth.
Answer: 9.8
Tip: Use a² + b² = c² and solve for the missing leg: subtract the known leg squared from the hypotenuse squared.
Print a worksheet of this skill New questions and an answer key, free.
Up next
- Next in this topic Is it a right triangle? Converse of the Pythagorean theorem Year 9
Print a free worksheet with answers (20 questions).
Practise without limits
Members practise as much as they like, every day, and get the printable packs and lessons too.