If ABC is an acute angles triangle ,acute angled at B and
AB2 + BC2 - 2BC.BD
AB2 + BC2
AB2 + AC2 + 2BC.BD
AB2 + AC2
All ______ triangles are similar .
Iso sceles
Equilateral
Scalene
None of these
The areas of two similar triangle are 81cm2 and 49 cm2 respectively.If the attitude of the first triangles is 6.3 cm then the corresponding attitude of the other is
4.9 cm
9.4 cm
49 cm
9.2 cm
If ratio of sides of two similar triangle is 5:4,then ratio of their perimeters is
3:4
5:4
1:2
4:5
Figure of same size and same shape are
Congruent
Similar
Both 1 and 2
Which of the following are similar ?
All circles
A cicle and a square
A square and a rectangle
All the above
The areas of two similar triangles 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
16:10
1:16
1:4
4:10
In the given figure DE || BC and AD:DB = 2:3The ratio of area(ΔADE) / area (ΔABC) is
25:4
4:25
4:9
9:4