Standard Mathematics Primary 5 Angles

Two straight lines AB and CD intersect at point O. A ray OE is drawn between rays OB and OD. Angle AOC = 52° and angle BOE = 35°. Find angle EOD.

A 17°
B 35°
C 52°
D 87°
Show Worked Solution

Worked Solution

Step 1: Identify the vertically opposite pair. Angles AOC and BOD are vertically opposite (formed by two intersecting straight lines). Therefore angle BOD = angle AOC = 52°. Step 2: Ray OE lies between OB and OD, so angle BOD is split into two parts. BOD = BOE + EOD 52° = 35° + EOD Step 3: Solve for angle EOD. EOD = 52° − 35° = 17° Answer: 17° Answer: 17°

Correct answer: 17°

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