The Pythagorean theorem

a^2 + b^2 = c^2 for finding a missing side, and its converse for checking right angles.

Standards:8.G.B.78.G.B.6

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 3

A ladder leans against a wall. The ladder is 13 feet long and reaches 12 feet up the wall. How far is the base of the ladder from the wall?

Question 2 of 3

A ladder leans against a wall. The ladder is 13 m long, and its base is 5 m from the wall. How high does the ladder reach up the wall?

Question 3 of 3

A ladder leans against a wall. The ladder is 13 m long and the base is 5 m from the wall. How high does the ladder reach up the wall?

How this fits in

The Pythagorean theorem is one skill in the Coordinate Geometry unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

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