All topicsTrigonometrySpecial right triangles
Grade 11 · Free practice
Special right triangles
45-45-90 and 30-60-90 side ratios, used to get exact answers without a calculator.
Try it: three questions
Real questions from the practice bank. Tap an answer to check it.
Question 1 of 3
A clock hand rotates 210° from 12 o'clock. Express this rotation in radians.
Question 2 of 3
Convert 5π/12 radians to degrees.
Question 3 of 3
Convert 5π/6 radians to degrees.
How this fits in
Special right triangles is one skill in the Trigonometry 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.
Practice special right triangles until it sticks
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