1.

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 thebreadth is decreased by 1 cm, the area of the rectangle is increased by 40 cm2. Find the length andbreadth of the rectangle.​

Answer»

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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