Question:
What is the area of the area of the triangle?
What is the area of the area of the triangle?
Options:
- a) 15 3 4 square cm
- b) 15 3 2 square cm
- c) 15 3 square cm
- d) 30 3 square cm Direction for Questions (49-50): Consider the following for the two (02) items that follow: The top (M) of a tower is observed from three points P, Q and R lying in a horizontal straight line which passes directly a long the foot (N) of the tower. The angles of elevations of M from P, Q and R are 30°, 45° and 60°, respectively. Let PQ = a and QR = b.
- a) 15 3 4 square cm
- b) 15 3 2 square cm
- c) 15 3 square cm
- d) 30 3 square cm Direction for Questions (49-50): Consider the following for the two (02) items that follow: The top (M) of a tower is observed from three points P, Q and R lying in a horizontal straight line which passes directly a long the foot (N) of the tower. The angles of elevations of M from P, Q and R are 30°, 45° and 60°, respectively. Let PQ = a and QR = b.
correct answer : a)
Explanation:
Area of triangle = 1
2× ac sinB
= 1
2 53×× × sin120°
=
1
2 15 60×× °sin
= 1
2 15 3
2××
= 15 3
4
2cm
Area of triangle = 1
2× ac sinB
= 1
2 53×× × sin120°
=
1
2 15 60×× °sin
= 1
2 15 3
2××
= 15 3
4
2cm