Chapter 12 – Heron’s Formula
If each side of a triangle is doubled, then find the ratio of area of the new triangle thus formed and the given triangle.
02
Jul
If each side of a triangle is doubled, then find the ratio of area of the new triangle thus formed and the given triangle. If each side of a triangle is doubled then find the ratio of area of the new triangle thus formed and the given triangle. July 2, 2021 Category: Chapter 12 - [...]
Calculate the area of the shaded region in Fig. 12.1.
02
Jul
Calculate the area of the shaded region in Fig. 12.1. Calculate the area of the shaded region in Fig. 12.1. July 2, 2021 Category: Chapter 12 - Heron's Formula , Maths , NCERT Class 9 ,
The sides of a triangular field are 41 m, 40 m and 9 m. Find the number of rose beds that can be prepared in the field, if each rose bed, on an average needs 900 cm^2 space.
02
Jul
The sides of a triangular field are 41 m, 40 m and 9 m. Find the number of rose beds that can be prepared in the field, if each rose bed, on an average needs 900 cm^2 space. 40 m and 9 m. Find the number of rose beds that can be prepared in the [...]
If a, b, c are the lengths of three sides of a triangle, then area of a triangle = root s(s – a) (s – b) (s – c) , where s = perimeter of triangle.
02
Jul
If a, b, c are the lengths of three sides of a triangle, then area of a triangle = root s(s – a) (s – b) (s – c) , where s = perimeter of triangle. B c are the lengths of three sides of a triangle If A then area of a triangle = [...]
The base of a right triangle is 8 cm and hypotenuse is 10 cm. Its area will be
02
Jul
The base of a right triangle is 8 cm and hypotenuse is 10 cm. Its area will be The base of a right triangle is 8 cm and hypotenuse is 10 cm. Its area will be July 2, 2021 Category: Chapter 12 - Heron's Formula , Maths , NCERT Class 9 ,
8. A design is made on a rectangular tile of dimensions 50 cm × 70 cm as shown in Fig. 12.7. The design shows 8 triangles, each of sides 26 cm, 17 cm and 25 cm. Find the total area of the design and the remaining area of the tile.
02
Jul
8. A design is made on a rectangular tile of dimensions 50 cm × 70 cm as shown in Fig. 12.7. The design shows 8 triangles, each of sides 26 cm, 17 cm and 25 cm. Find the total area of the design and the remaining area of the tile. 17 cm and 25 cm. [...]
7. The dimensions of a rectangle ABCD are 51 cm × 25 cm. A trapezium PQCD with its parallel sides QC and PD in the ratio 9 : 8, is cut off from the rectangle as shown in the Fig. 12.6. If the area of the trapezium PQCD is 5/6 th part of the area of the rectangle, find the lengths QC and PD.
02
Jul
7. The dimensions of a rectangle ABCD are 51 cm × 25 cm. A trapezium PQCD with its parallel sides QC and PD in the ratio 9 : 8, is cut off from the rectangle as shown in the Fig. 12.6. If the area of the trapezium PQCD is 5/6 th part of the area [...]
Tags:
7. The dimensions of a rectangle ABCD are 51 cm × 25 cm. A trapezium PQCD with its parallel sides QC and PD in the ratio 9 : 8 ,
find the lengths QC and PD. ,
is cut off from the rectangle as shown in the Fig. 12.6. If the area of the trapezium PQCD is 5/6 th part of the area of the rectangle ,
6. In Fig. 12.5, ∆ ABC has sides AB = 7.5 cm, AC = 6.5 cm and BC = 7 cm. On base BC a parallelogram DBCE of same area as that of ∆ ABC is constructed. Find the height DF of the parallelogram.
02
Jul
6. In Fig. 12.5, ∆ ABC has sides AB = 7.5 cm, AC = 6.5 cm and BC = 7 cm. On base BC a parallelogram DBCE of same area as that of ∆ ABC is constructed. Find the height DF of the parallelogram. ∆ ABC has sides AB = 7.5 cm 6. In Fig. [...]
5. 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 1m^2 of the field, find the total cost of ploughing the field.
02
Jul
5. 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 1m^2 of the field, find the total cost of ploughing the field. [...]
4. A rectangular plot is given for constructing a house, having a measurement of 40 m long and 15 m in the front. According to the laws, a minimum of 3 m, wide space should be left in the front and back each and 2 m wide space on each of other sides. Find the largest area where house can be constructed.
02
Jul
4. A rectangular plot is given for constructing a house, having a measurement of 40 m long and 15 m in the front. According to the laws, a minimum of 3 m, wide space should be left in the front and back each and 2 m wide space on each of other sides. Find the [...]
Tags:
4. A rectangular plot is given for constructing a house ,
a minimum of 3 m ,
having a measurement of 40 m long and 15 m in the front. According to the laws ,
wide space should be left in the front and back each and 2 m wide space on each of other sides. Find the largest area where house can be constructed. ,