Chapter 9 Solution of Triangle

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Triangle Question
Diagram 6 shows a pyramid with its triangle base placed on a horizontal plane. Vertex V. is vertically above P. Given that \angle P Q R=40^{\circ}, P Q=12 \mathrm{~cm}, Q R=10 \mathrm{~cm} and \angle V Q P=50^{\circ}

Rajah 6 memunjukkan sebuah pyramid dengan tapak segitiga yang diletakkan atas satah mengufuk. Puncak V berada tegak di atas P. Diberi \angle P Q R=40^{\circ}, P Q=12 \mathrm{~cm}, Q R=10 \mathrm{cm} dan \angle V Q P=50^{\circ}.
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Calculate
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(a) the length of P R [2 marks]
panjang P R

(b) \angle V R P, [2 marks]

(c) the angle between the planes V Q P and V R P. [2 marks]
sudut di antara satah VQP dan VRP.

(d) the area of the triangle V Q R. [4marks]
Luas segitiga VQR.

Triangle Solution

Hi,this is my answer for question (a)

Answer B

I’m not sure my answer is correct or not. Please let me know if my answer is wrong.:grinning_face_with_smiling_eyes:


ANSWER : 61.53° / 61° 32’

Answer C

ANSWER: 180°

Answer D