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Triangle Types and Angles
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Triangle Types and Angles
📐 Part 1: Triangle Types
1. What type of triangle has all three sides equal?
Equilateral
Isosceles
Scalene
2. Which triangle has exactly two equal sides?
Equilateral
Isosceles
Scalene
3. A scalene triangle has:
All sides equal
Two sides equal
No sides equal
4. What is the sum of all interior angles in ANY triangle?
90°
180°
360°
🔢 Part 2: Angle Calculations
5. In a triangle, two angles measure 60° and 70°. What is the third angle?
Answer: ______°
6. An equilateral triangle has all angles equal. What is each angle?
Answer: ______°
7. In an isosceles triangle, the two equal angles each measure 45°. What is the third angle?
Answer: ______°
8. A triangle has angles of 30° and 120°. What type of triangle is this based on its angles?
Acute triangle (all angles less than 90°)
Right triangle (one angle equals 90°)
Obtuse triangle (one angle greater than 90°)
✏️ Part 3: Design Challenge
9. Draw and label a kite design using triangles. Include at least one equilateral and one isosceles triangle. Label all angles.
10. Explain why you chose these triangle types for your kite design:
11. List three properties that make a triangle an equilateral triangle:
1. _________________________________________________
2. _________________________________________________
3. _________________________________________________
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