Triangle Angles Worksheet
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Triangle Angles Worksheet
📐 Part 1: Angle Classification
a) 45° is:
Acute Right Obtuse Reflexb) 90° is:
Acute Right Obtuse Reflexc) 135° is:
Acute Right Obtuse Reflexd) 200° is:
Acute Right Obtuse Reflex📏 Part 2: Measuring Angles
Triangle A:
Angle 1: ______° Classification: ___________
Angle 2: ______° Classification: ___________
Angle 3: ______° Classification: ___________
Sum of angles: ______ + ______ + ______ = ______°
60°, 70°, and 50°
Verification: ______ + ______ + ______ = ______°
🧮 Part 3: Finding Missing Angles
a) Triangle with angles 45° and 85°. Find the third angle.
Missing angle = ______°
b) Triangle with angles 30° and 120°. Find the third angle.
Missing angle = ______°
c) Triangle with angles 72° and 38°. Find the third angle.
Missing angle = ______°
x = ______
Angle A = ______°
Angle B = ______°
Angle C = ______°
🔄 Part 4: Interior and Exterior Angles
The sum of interior angles in any triangle is always 180°:
True FalseAn exterior angle equals the sum of the two opposite interior angles:
True FalseA triangle can have two obtuse angles:
True FalseAll triangles have at least two acute angles:
True False🏗️ Part 5: Real-World Applications
Angle R = ______°
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