Advertisements
Advertisements
Question
The area of triangle formed by the points (− 5, 0), (0, – 5) and (5, 0) is
Options
0 sq.units
25 sq.units
5 sq.units
none of these
Solution
25 sq.units
Explanation;
Hint:
Area of the ∆
= `1/2[25 + 0 + 0 - (0 - 25 + 0)]`
= `1/2[25 + 25]`
⇒ `1/2 xx 50`
= 25 sq.units
APPEARS IN
RELATED QUESTIONS
There is a slide in the park. One of its side walls has been painted in some colour with a message “KEEP THE PARK GREEN AND CLEAN” (see the given figure). If the sides of the wall are 15m, 11m, and 6m, find the area painted in colour.
Find the area of a triangle whose base and altitude are 5 cm and 4 cm respectively.
Find the area of a triangle whose sides are 3 cm, 4 cm and 5 cm respectively.
Determine whether the sets of points are collinear?
`(-1/2, 3), (-5, 6) and (-8, 8)`
Determine whether the sets of points are collinear?
(a, b + c), (b, c + a) and (c, a + b)
The area of a triangle is 5 sq. units. Two of its vertices are (2, 1) and (3, −2). The third vertex is (x, y) where y = x + 3. Find the coordinates of the third vertex.
Find the area of a triangle formed by the lines 3x + y – 2 = 0, 5x + 2y – 3 = 0 and 2x – y – 3 = 0
The sides of the triangular ground are 22 m, 120 m and 122 m. Find the area and cost of levelling the ground at the rate of ₹ 20 per m2
Find the area of the unshaded region
A field is in the shape of a trapezium having parallel sides 90 m and 30 m. These sides meet the third side at right angles. The length of the fourth side is 100 m. If it costs Rs 4 to plough 1 m2 of the field, find the total cost of ploughing the field.
