Advertisements
Advertisements
प्रश्न
Find the area of triangle FED
उत्तर
Area of a triangle = `1/2` [(x1y2 + x2y3 + x3y1) – (x2y1 + x3y2 + x1y3)]
Area of ∆FED = `1/2[(-2 + 4.5 + 3) - (4.5 + 1 - 6)]`
= `1/2[5.5 - (- 0.5)]`
= `1/2[5.5 + 0.5]`
= `1/2 xx 6`
= 3 sq.units
APPEARS IN
संबंधित प्रश्न
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.
The perimeter of a triangular field is 240 dm. If two of its sides are 78 dm and 50 dm, find the length of the perpendicular on the side of length 50 dm from the opposite vertex.
Find the area of a quadrilateral ABCD in which AB = 42 cm, BC = 21 cm, CD = 29 cm, DA =34 cm and diagonal BD =20 cm.
Find the area of a triangle whose sides are 3 cm, 4 cm and 5 cm respectively.
Find the area of triangle AGF
The semi-perimeter of a triangle having sides 15 cm, 20 cm and 25 cm is
The perimeter of an equilateral triangle is 30 cm. The area is
From a point in the interior of an equilateral triangle, perpendiculars are drawn on the three sides. The lengths of the perpendiculars are 14 cm, 10 cm and 6 cm. Find the area of the triangle.
A rhombus shaped sheet with perimeter 40 cm and one diagonal 12 cm, is painted on both sides at the rate of Rs 5 per m2. Find the cost of painting.
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.
