18. A children park is in the triangular shape as shown m the figure. In the middle of the park there is a circular report
younger children to play. It is fenced with three layers of wire. The radius of the circular region is 3.5 m
B
C
On the basis of the above information, answer the following questions :
(C) 22 in
(c) 60 m
The Perimeter of the circular region is
(d) 28 m
El 15 m
(b) 20 m
(in The length of fence required ist
(b) 66 m
(d) 48 m
area of the circular region is:
ta 774 m
fb) 64 sqm
(c) 54.6 sq m
(d) 38.5 sqm
(iv) TBD bm. DC-9 m and ar (A ABC) = 56 sq m, then the length of sides AB and AC are respectively.
a) m, 12 m
(b) 12 m. 9 m
(c) 10 m, 12 m
(d) 12 m, 10 m
The perincter of A ABC 15 :
taj 28 m
(b) 12 m
(c) 36 m
(d) 38 m
Answers
Answer:
Mark as brainlest
Step-by-step explanation:
The perimeter of the following geometrical shapes are discussed in the first section:
Square
Perimeter of a square = 4 × side
Rectangle
Perimeter of a rectangle = 2 × (length + breadth)
The section is divided into two sub-parts:
1. Triangles as parts of rectangles
2. Generalising for other congruent parts of rectangles
Before moving onto exercise 11.2, the topics Area of triangle and parallelogram are discussed.
Area of a square = side × side
Area of a rectangle = length × breadth
Area of a parallelogram = base × height
Area of a triangle =1/2 × base × height
In the other half of the chapter, circles are explained. The topic is explained in two parts:
1. Circumference of Circle
The distance around a circular region is known as its circumference.
Circumference of a circle = πd
2. Area of circle
Area of circle is given by πr2
The last part of the chapter is about the conversion of units and application of the formulas.
Based on the conversion of units for lengths, studied in the chapter, the units of areas can also be converted:
1 cm2 = 100 mm2
1 m2 = 10000 cm2
1 hectare = 10000 m2