WHAT'S INCLUDED:

This lesson is aligned with TEKS - 4th Grade Mathematics.

• TEKS Math 4.6C: Apply knowledge of right angles to identify acute, right, and obtuse triangles;

Task Card Sizes: Prints in 8.5 x 11

• (1 in 1 page)
• (2 in 1 page)
• (4 in 1 page)
• (6 in 1 page)

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24 Questions:

1. A gardener makes a triangle sign for a row of tulips. All three angles are smaller than a right angle. What type of triangle is it?
2. At the spring art fair, Mia draws a triangle with one corner shaped exactly like the corner of a square. What kind of triangle did she draw?
3. During a spring picnic, Liam folds paper into a triangle. One angle opens wider than a right angle. Which triangle did he make?
4. A spring kite has angles measuring 90°, 45°, and 45°. Which best describes the kite’s triangle shape?
5. Emma is sorting triangle flower tags. Which triangle should go in the acute group?
6. Noah sees a triangle flag at the spring parade. One angle is 110°. What kind of triangle is the flag?
7. Olivia compares triangle corners to the corner of her notebook. Which triangle has a right angle? A triangle with…
8. A triangle in a spring garden design has angles of 50°, 60°, and 70°. What type is it?
9. Which spring pennant is a right triangle?
10. Ethan builds a small greenhouse frame shaped like a triangle. One angle measures 95°. Which label fits best?
11. At a spring market, a sign maker wants a triangle with exactly one right angle. Which triangle should be chosen?
12. A butterfly garden marker is shaped like a triangle with angles 35°, 55°, and 90°. How should it be named?
13. Ava is checking triangle decorations for the spring dance. Which triangle measures are not acute?
14. Which statement about an obtuse triangle is true?
15. Ben finds three triangle seed packets. Which packet shows an obtuse triangle?
16. A triangle flower bed has one angle shaped like the corner of a tile. What type of triangle is the flower bed?
17. During a spring camping trip, a tent flap is shaped like a triangle. All three angles are smaller than a right angle. Which best describes the tent flap?
18. Chloe says a triangle with one angle of 100° is a right triangle. What is the best response?
19. Which triangle could be used when a builder needs a square corner for a spring birdhouse support?
20. A spring trail sign uses a triangle with angles 89°, 46°, and 45°. What type of triangle is it?
21. A triangle banner has one angle that is larger than a right angle, and the other two are smaller. Which is the best name for the banner?
22. At the spring fair, Olivia cuts a triangle from bright paper. Its angles are 90°, 35°, and 55°. What type of triangle did she make?
23. At the school garden, students sort triangular stepping-stone designs. Which triangle is correctly matched to its name?
24. A gardener designs a triangle flower bed with angles 65°, 55°, and 60°. How should the flower bed be classified?