Answer:
C) 15
Step-by-step explanation:
Let’s take the width as ‘w’
Length = 10 + 3w
Perimeter = 2l + 2w
2 (10 + 3w) + 2w = 180
20 + 6w + 2w = 180
20 + 8w = 180
8w = 180-20
8w= 160
w= 20
Dimensions:
Width = 20 cm
Lengths = (10+3w) = 70 cm
Answer:
1
Step-by-step explanation:
there are 4 spaces between each big mark
Answer:
No, because 6² + 8² ≠ 12²
Step-by-step explanation:
In a right angled triangle,
Perpendicular² + Base² = Hypotenuse² (pythagoras theorem)
But in the given triangle; 6² + 8² ≠ 12²
36 + 64 ≠ 144
100 ≠ 144
Perpendicular² + base² ≠ hypotenuse²
Thus the given triangle is not right angled.