# A hand fan is made by stitching 10 equal size triangular strips of two different types of paper as shown in Fig. 12.28. The dimensions of equal strips are 25 cm, 25 cm and 14 cm. Find the area of each type of paper needed to make the hand fan.

Let a, b and c are the sides of triangular strips and s is

the semi-perimeter, then its area is given by:

A = where [Heron’s Formula]

= = 32

A=

A = = cm2

Hence, total area of 5 Nos of triangular strips of one type = 5 × 168 = 840 cm2

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Heron's Formula43 mins
Heron's formula32 mins
Quiz | Heron's Formula44 mins
NCERT | Heron's Formula49 mins
Champ Quiz | Heron's Formula41 mins
Champ Quiz | Know About Heron's Formula53 mins
Quiz | Heron's Formula45 mins
Quiz | Herons Formula44 mins
Champ Quiz | Area of Triangle53 mins
NCERT | Important Qs. on Herons Formula42 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses