Standard Mathematics Primary 3 Angles

Ahmad is flying a kite at East Coast Park. The kite string forms three angles around a fixed point on the frame. Two of the angles measure 90° and 135°. What type of angle is the remaining angle at that point?

A Acute angle
B Right angle
C Obtuse angle
D Reflex angle
Show Worked Solution

Worked Solution

Step 1: Recall that angles around a point sum to 360°. Step 2: Add the two known angles: 90° + 135° = 225°. Step 3: Subtract from 360° to find the remaining angle: 360° − 225° = 135°. Step 4: Classify 135°. Since 90° < 135° < 180°, the angle is an OBTUSE angle. Answer: Obtuse angle Answer: Obtuse angle

Correct answer: Obtuse angle

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