9.
10. If the perimeter of a square is 64 cm, what is the length of each side of a square?
11. Two sides of a triangle are 4 cm and 7 cm. What will be the third side if:
corceles triangle and the perimeter is 18 cm?
Answers
Answer:
Only 9) perimeter of square =64cm
Area of square = 4 ×side
64 = 4 × side
64/4 = side
16 cm is the side of the square
10.perimeter of a square =4×sides
perimeter of the square=4×x=64cm
therefore length of each side=64/4=16cm
therefore area of the square=l²=(16)²=256cm²
11.we know that perimeter of a triangle =a+b+c(here a,b and c are sides of the triangle)
two sides are respectively 4 cm and 7 cm
then the other side =18-(4+7)cm=18-11cm=7cm
A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted \triangle ABC. In Euclidean geometry, any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane. Wikipedia
Area: ½ × base × height
Perimeter: sum of side lengths of the triangle
Number of vertices: 3Number of edges: 3
Internal angle: 60° (for equilateral)
Sum of interior angles: 180°