$Geometry and proof: fill in the blanks: fill-in-the-blank worksheet for Grade 11, page 1 preview$

Fill-in-the-blank worksheet · Mathematics

Geometry and proof: fill in the blanks · Grade 11

Read 8 sentences about geometry and proof and write the missing word in each, using the word bank. Practices reading for meaning and topic vocabulary.

Grade 11 · ages 16 to 17
Medium
15 to 20 minutes
1 page
Free

The answer key is a separate page for grown-ups. Sign in to download it.

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The word bank and sentences

Directions: Read each sentence. Choose the best word from the word bank and write it on the line.

Word bank: cross out each word as you use it
similar · supplementary · complementary · midpoint hypotenuse · congruent · counterexample · theorem
1 The · of a segment divides it into two equal parts.
2 figures have the same size and shape.
3 Two angles that add up to 180 degrees are ____.
4 triangles have equal angles and proportional sides.
5 Two angles that add up to 90 degrees are ____.
6 In a right triangle, a² + b² = c², where c is the ____.
7 A · is a statement that has been proven.
8 A single · is enough to show a statement is false.
Your turn · Write a sentence of your own that uses a word from the word bank.

What your child practices

Your child practices reading for meaning and topic vocabulary.

Grades and ages: Grade 11, ages 16 to 17
Time: About 15 to 20 minutes
Subject: Mathematics
Level: Medium for Grade 11
Answer key: Yes, for grown-ups who sign in
Printing: 1 page, US Letter or A4, low-ink option
Updated: October 15, 2026

How to use it

Try the first question together so the format is clear. Then let your child work through the rest, showing their thinking on the page. It is pitched at the expected level for Grade 11, for practice after the topic has been taught.

An answer key comes with it as a separate page that grown-ups download after signing in.

Tip for grown-ups: Read each sentence aloud with a hum for the blank, then try each word bank word in it.

Done on paper? A grown-up can record it on the child's page in PlayOwl; downloading alone doesn't count as finished.