The areas of two similar triangles are 81 cm2 and 49 cm2 respectively. If the altitude of the first triangle is 6.3 cm then the corresponding altitude of the other is
4.9 cm
9.4 cm
49 cm
9.2 cm
All ________ triangles are similar.
Isosceles
Equilateral
Scalene
None of these
From a point Q, the length of the tangent to a circle is 24 cm and the distance of Q from the centre is 25 cm, then the radius of the circle is
12 cm
7 cm
15 cm
24.5 cm
If two concentric circles have radii 5 cm and 3 cm then the length of the chord of the larger circle which touches the other circle is
8 cm
9 cm
10 cm
Figures of same size and same shape are
Congruent
Similar
Both 1 and 2
The areas of two similar triangle are 121 cm2 and 64 cm2 respectively. If the median of the first triangle is 12.1 cm, the corresponding median of the other is
9.9 cm
10.2 cm
8.8 cm
6.6 cm
Two circles touch externally at a point P. From a point T on a common tangent PT, tangent segments TA and TB are drawn to the two circles. Then TA =
PB
TB
OB
2 TB
16 : 10
1 : 16
1 : 4
4 : 10
When a point P lies on a circle, then number of tangents to the circle through P is
0
1
2
3
The length of the diagonal of a rectangle is 10 cm. The area of its circumscribed circle is
10 π cm2
25 π cm2
100 π cm2
50 π cm2
