Question:

The figure shows 4 triangles. Find the sum of ∠m + ∠n + ∠h + ∠j + ∠k + ∠l.

1 m

If ∠x is 120 °, find the sum of ∠u, ∠v, ∠w, ∠y,and ∠z.

2 m

XYZ and OYZ are isosceles triangles. XY = XZ, OY = OZ, ∠XYO = 18° and ∠YOZ = 80°. Find ∠a.

2 m

PSLE

In the figure, LOP and MON are straight lines. ∠LPN = 55°, ∠PLM = 114° and ∠MNP = 90°. Find ∠LMN.

In the figure, LOP and MON are straight lines. ∠LPN = 55°, ∠PLM = 114° and ∠MNP = 90°. Find ∠LMN.

2 m

In the figure, AOB, COD, EOF and GOH are straight lines. Find ∠s + ∠k + ∠l + ∠m + ∠n + ∠p + ∠q + ∠r.

2 m

A square piece of paper is folded as shown in the figure.

- Find ∠ADE.
- Find ∠EDC.

2 m

An equilateral triangle, XYZ, is folded as shown in the figure. Find

- ∠BAZ
- ∠YBZ.

2 m

Find the sum of ∠m, ∠n, ∠p, ∠l and ∠k.

2 m

The figure, not drawn to scale, shows a regular 5-point star and ∠a = ∠b = ∠c = ∠d = ∠e.

- Express ∠f as a sum of two angles. Give the answers in equation. (Eg ∠a + ∠b)
- lf ∠e = 32°, find ∠f.

2 m

The figure is not drawn to scale. Find the sum of ∠FAC + ∠FBD + ∠ACF + ∠DFC.

3 m