Brijesh Dwevedi and Jitendra Gupta Solutions for Chapter: Heron's Formula, Exercise 1: Exam Practice

In the marriage of Raj's brother Rajesh, a conical tent is made by stitching $12$ triangular pieces of cloth of two different colours red and white alternately, each piece measuring $10 \mathrm{cm}, 20 \mathrm{cm}$ and $20 \mathrm{cm}$.

(ii) Find the semi perimeter of one red colour triangle.

In the marriage of Raj's brother Rajesh, a conical tent is made by stitching $12$ triangular pieces of cloth of two different colours red and white alternately, each piece measuring $10 \mathrm{cm}, 20 \mathrm{cm}$ and $20 \mathrm{cm}$.

(iv) How much cloth of red colour is required to make a conical tent?

In the marriage of Raj's brother Rajesh, a conical tent is made by stitching $12$ triangular pieces of cloth of two different colours red and white alternately, each piece measuring $10 \mathrm{cm}, 20 \mathrm{cm}$ and $20 \mathrm{cm}$.

Find the total length of triangular pieces of white colour.

Green cleaning refers to cleaning methods and products that are environmentally friendly ingredients and procedures to preserve human health and environmental quality. To preserve the environment. Ramesh made a slide in the park of his society. One the side walls of the slide there was a message "TAKE SHORT WALK IN PARK DOWN A HAPPY TRAIL (see figure). If the sides of the wall are $15 \mathrm{m}, 11 \mathrm{m}$ and $6 \mathrm{m}$. then answer the questions by looking at the figure.

(i) Find the semi-perimeter of triangle.

Green cleaning refers to cleaning methods and products that are environmentally friendly ingredients and procedures to preserve human health and environmental quality. To preserve the environment. Ramesh made a slide in the park of his society. One the side walls of the slide there was a message "TAKE SHORT WALK IN PARK DOWN A HAPPY TRAIL (see figure). If the sides of the wall are $15 \mathrm{m}, 11 \mathrm{m}$ and $6 \mathrm{m}$. then answer the questions by looking at the figure.

(ii) Write the type of triangle given in question.

Green cleaning refers to cleaning methods and products that are environmentally friendly ingredients and procedures to preserve human health and environmental quality. To preserve the environment. Ramesh made a slide in the park of his society. One the side walls of the slide there was a message "TAKE SHORT WALK IN PARK DOWN A HAPPY TRAIL (see figure). If the sides of the wall are $15 \mathrm{m}, 11 \mathrm{m}$ and $6 \mathrm{m}$. then answer the questions by looking at the figure.

(iii) Find the area (in ${\mathrm{m}}^2$) of the wall. 

Green cleaning refers to cleaning methods and products that are environmentally friendly ingredients and procedures to preserve human health and environmental quality. To preserve the environment. Ramesh made a slide in the park of his society. One the side walls of the slide there was a message "TAKE SHORT WALK IN PARK DOWN A HAPPY TRAIL (see figure). If the sides of the wall are $15 \mathrm{m}, 11 \mathrm{m}$ and $6 \mathrm{m}$. then answer the questions by looking at the figure.

(iv) Find the cost of painting the side wall, if the price is $₹8 \mathrm{per} {\mathrm{m}}^2$. 

Green cleaning refers to cleaning methods and products that are environmentally friendly ingredients and procedures to preserve human health and environmental quality. To preserve the environment. Ramesh made a slide in the park of his society. One the side walls of the slide there was a message "TAKE SHORT WALK IN PARK DOWN A HAPPY TRAIL (see figure). If the sides of the wall are $15 \mathrm{m}, 11 \mathrm{m}$ and $6 \mathrm{m}$. then answer the questions by looking at the figure.

(v) Write the formula to find the area of triangle.