Listen NCERT Audio Books - Kitabein Ab Bolengi
In the given figure ABC and DBC have the same base BC such that AB = 120m, AC = 122m, BC = 22m, BD = 24m and CD = 26m. Find the area of the shaded region. (Take = 10.25)
It is given in the question that,
AB = 120 m
AC = 122 m
BC = 22 m
BD = 24 m
And, CD = 26 m
We know that,
Perimeter of triangle = Sum of all sides
∴ Perimeter of = AB + BC + AC
= 120 + 22 + 122
= 264 m
= 132 m
Now, Area () =
= 11 × 12 × 10
= 1320 m2
BC = a, BD = b and CD = c
∴ Perimeter of = 22 + 24 + 26
= 72 m
= 36 m
Hence, area ( =
= 24 × 10.25
= 246 m2
∴ Area of shaded region = Area () – Area ()
= 1320 – 246
= 1074 m2
Given a ABC in which
I. A, B and C are in the ratio 3: 2 :1.
II. AB , AC and BC are in the ratio 3 : 3 : 2 3 and AB = 3 3 cm.
Is ABC a right triangle?
The question give above has two Statements I and II. Answer the questions by using instructions given below:
(a) If the question can be answered by one of the given statements only and not by the other.
(b) If the question can be answered by using either statement alone.
(c) If the question can be answered by using both the statements but cannot be answered by using either statement.
(d) If the question cannot be answered even by using both the statements together.