Find a missing side of a right triangle

Answer Key - Grade 8 Math Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Bo folds a paper right triangle for a mobile. How long is its hypotenuse, in cm?

   17
2. 2.

   Esme lays a right triangle of tiles on the floor of the art room. How long is the hypotenuse, in inches?

   20
3. 3.

   Jun draws a skinny right triangle with a ruler and a pencil. How long is the hypotenuse, in inches?

   25
4. 4.

   Kira's park map shows a right-triangle lawn. A duck is drawn in one corner. How long is the hypotenuse, in feet?

   29
5. 5.

   Luz's class plants a right-triangle herb bed. How long is the unlabeled leg, in feet?

   9
6. 6.

   Noah cuts a long right triangle from a paper strip. How long is the short leg, in cm?

   12
7. 7.

   Pia's robot draws a right triangle and forgets one label. It looks embarrassed. How long is that leg, in cm?

   14
8. 8.

   Tala draws a right triangle on paper and wants the exact hypotenuse. Written as a square root, how long is the hypotenuse, in cm?

   √74
9. 9.

   Zee's pencil sketch shows a right triangle. The hypotenuse is not a whole number. Written as a square root, how long is it, in inches?

   √52
10. 10.

    Ari's math book asks for an exact length, so no rounding today. Written as a square root, how long is the hypotenuse, in cm?

    √73