In a right angled triangle, one of the acute angles is four times the other. What is the measure of the smallest angle of the triangle?
(a)15°
(b)18°
(c)20°
(d)22°
Details
What is the length of the altitude of an equilateral triangle of side 4 cm?
(a)4 cm
(b)6 cm
(c)2√3 cm
(d)2 cm
Details
2.
If a triangle has two sides having lengths 8 units and 12 units, which of the following can be the length of the third side?
(a)2 units
(b)4 units
(c)6 units
(d)All of these
Details
3.
What is the area (in cm) of a triangle with sides 6 cm, 8 cm and 10 cm?
(a)34
(b)24
(c)12
(d)None of these
Details
5.
A triangle has three internal angles in the ratio of 3 : 4 : 5. What is the value of the greatest external angle?
(a)57°
(b)90°
(c)135°
(d)Can’t be determined
Details
In ΔABC, D is a point on side BC such that BC = 5 × BD and A(ΔABC) is 100 sq. units. What is the area of ΔABD in sq. units?
(a)20
(b)25
(c)100
(d)12.5
