Advertisements
Advertisements
प्रश्न
Find the missing value:
| Base | Height | Area of Triangle |
| ______ | 31.4 mm | 1256 mm2 |
Advertisements
उत्तर
| Base | Height | Area of Triangle |
| 80 | 31.4 mm | 1256 mm2 |
Explanation:
b = ?
h = 31.4 mm
Area = `1/2 xx b xx h` = 1256 mm2
`1/2 xx b xx 3.14` = 1256
b = `(1256xx2)/31.4`
b = 80 mm
Therefore, the base of triangle is 80 mm.
APPEARS IN
संबंधित प्रश्न
In Fig. 6, ABC is a triangle coordinates of whose vertex A are (0, −1). D and E respectively are the mid-points of the sides AB and AC and their coordinates are (1, 0) and (0, 1) respectively. If F is the mid-point of BC, find the areas of ∆ABC and ∆DEF.
Find the area of a triangle whose vertices are A(3, 2), B (11, 8) and C(8, 12).
The class X students of a secondary school in Krishinagar have been allotted a rectangular plot of land for their gardening activity. Saplings of Gulmohar are planted on the boundary at a distance of 1 m from each other. There is a triangular grassy lawn in the plot as shown in the following figure. The students are to sow seeds of flowering plants on the remaining area of the plot.
(i) Taking A as origin, find the coordinates of the vertices of the triangle.
(ii) What will be the coordinates of the vertices of Δ PQR if C is the origin?
Also calculate the areas of the triangles in these cases. What do you observe?
Find the area of a triangle whose vertices are
(6,3), (-3,5) and (4,2)
Find the area of the quadrilaterals, the coordinates of whose vertices are
(−3, 2), (5, 4), (7, −6) and (−5, −4)
The area of a triangle is 5. Two of its vertices are (2, 1) and (3, −2). The third vertex lies on y = x + 3. Find the third vertex.
Show that the points A(3, 0), B(6, 4) and C(–1, 3) are the vertices of an isosceles right triangle.
A field is in the shape of a right angled triangle whose base is 25 m and height 20 m. Find the cost of levelling the field at the rate of ₹ 45 per sq.m2
The area of a triangle with base 4 cm and height 6 cm is 24 cm2.
Let a vector `αhati + βhatj` be obtained by rotating the vector `sqrt(3)hati + hatj` by an angle 45° about the origin in counter-clockwise direction in the first quadrant. Then the area of triangle having vertices (α, β), (0, β) and (0, 0) is equal to ______.
