The perimeter of a triangle is 30 cm and its area is 30 cm2. If the largest side measures 13 cm, then what is the length of the smallest side is the triangle? |
|||||||
(a) |
3 cm |
(b) |
4 cm |
(c) |
5 cm |
(d) |
6 cm |
The perimeter of a triangle is 30 cm and its area is 30 cm2. If the largest side measures 13 cm, then what is the length of the smallest side is the triangle? |
|||||||
(a) |
3 cm |
(b) |
4 cm |
(c) |
5 cm |
(d) |
6 cm |
Smallest side = other sides are 13 cm,
cm.
Let
Smallest side = 5 cm.
Two plane mirrors are inclined to each other such that a ray of light incident on the first mirror (M1) and parallel to the second mirror (M2) is finally reflected from the second mirror (M2) parallel to the first mirror (M1). The angle between the two mirrors will be:
a. |
90° |
b. |
45° |
c. |
75° |
d. |
60° |
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