Page 10 - Steady Matematik 2021 TG2 Buku B

Matematik Tingkatan 2 Bab 4 Poligon

H Selesaikan setiap yang berikut. TP 4 ARAS S
Solve each of the following.

Contoh 1.
105° 85°

x k
m
y
80°
60° 140° z

Cari nilai k + m.
Cari nilai x + y + z. Find the value of k + m.
Find the value of x + y + z.
k + 75° + 85° + m + 80° = 360°
x + y + z + 40° + 60° = 360° k + m + 240° = 360°
x + y + z + 100° = 360° k + m = 360° − 240°
x + y + z = 360° − 100° k + m = 120°
x + y + z = 260°

2. 3.

8p r
42° 80°
8m
q
144° 66°
p

Cari nilai m + p. Cari nilai p + q + r.
Find the value of m + p. Find the value of p + q + r.
8m + 8p + 42° + 66° + 36° = 360° p + q + r + (180° − 80°) = 360°
8m + 8p + 144° = 360° p + q + r + 100° = 360°
8m + 8p = 216° p + q + r = 360°− 100°
8(m + p) = 216° p + q + r = 260°
216°
m + p =
8
m + p =27°

I Hitung bilangan sisi bagi setiap poligon sekata dengan menggunakan nilai sudut yang diberi. TP 3 ARAS S
Calculate the number of sides of each regular polygon by using the value of angle given.

Contoh 1. Sudut peluaran / Exterior angle 2. Sudut peluaran / Exterior angle
= 40° = 45°
Sudut peluaran / Exterior angle
= 24° 360° 360°
n = n =
360° 40° 45°
n =
24° = 9 = 8
= 15

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