other by 8 km/h, find the speed of each car.
18. The breadth of a rectangle is 4 cm less than its length. If the length is increased by 4 cm and the
breadth is decreased by 1 cm, the area of the rectangle is increased by 40 cm2. Find the length and
breadth of the rectangle.
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Step-by-step explanation:
Answer:
Given :-
• one angle = sum of other two angles.
To prove :-
• it is a right angle triangle
Solution:-
let's,
° 1st angle - ∠A
° 2nd angle - ∠B
° 3rd angle - ∠C
∠A + ∠ B + ∠C = 180° ( Given )
∠C + (∠A + ∠B) = 180°
∠C + ∠C 180°
2∠C = 180°/2
________________
∠C = 90°
________________
∠C = 90°, therefore the triangle is right angle triangle.
Step-by-step explanation:
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