Question
Calculate the length of AC.
AC = ………………………………… cm
Answer/Explanation
4.8[0] or 4.802…
Question
Calculate the value of x.
Answer/Explanation
Ans: 23.2
Question
Calculate angle BAC.
Angle BAC = …………………………………………..
Answer/Explanation
Ans:
75.1 or 75.09 to 75.10
Question
The diagram shows a rectangular playground ABCD on horizontal ground.
A vertical flagpole CF, 6 metres high, stands in corner C.
AB = 18m and BC = 15m.
Calculate the angle of elevation of F from A.
Answer/Explanation
Ans: 14.4 or 14.36…
Question
(a) Find the area of triangle ABC.
……………………………………… \(m^{2}\)
(b) Calculate AC
Answer/Explanation
(a)2.24
(b) 3.22 or 3.224 to 3.225
Question
The diagram shows a right-angled triangle.
Calculate the value of x.
x = [2]
Answer/Explanation
Ans:
12 6.88 or 6.882 to 6.883
Question
Mahmoud is working out the height, $h$ metres, of a tower $B T$ which stands on level ground. He measures the angle $T A B$ as $25^{\circ}$.
He cannot measure the distance $A B$ and so he walks $80 \mathrm{~m}$ from $A$ to $C$, where angle $A C B=18^{\circ}$ and angle $A B C=90^{\circ}$.
Calculate
(a) the distance $A B$,
(b) the height of the tower, BT.
▶️Answer/Explanation
(a) 24.7
(b) 11.5