Pythagoras' Theorem Flashcards

(26 cards)

1
Q

Find out a if the hypotenuse is 8 cm and the base is 6 cm. Then round to one significant figure

A

5.2915 and 5

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2
Q

What is the definition of a right-angled triangle?

A

A triangle that has one angle equal to 90 degrees.

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3
Q

In a right-angled triangle, what is the side opposite the right angle called?

A

Hypotenuse.

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4
Q

If one leg of a right-angled triangle is 4 cm and the other leg is 3 cm, what is the length of the hypotenuse?

A

x = 5 cm.

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5
Q

What theorem can be used to calculate the length of the hypotenuse in a right-angled triangle?

A

Pythagorean theorem.

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6
Q

True or False: The Pythagorean theorem states that the square of the hypotenuse is equal to the sum of the squares of the other two sides.

A

True.

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7
Q

Fill in the blank: In a right-angled triangle with legs of length 4 cm and 3 cm, the equation is ___ + ___ = x^2.

A

4^2, 3^2.

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8
Q

What is the value of 4^2?

A

16.

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9
Q

What is the value of 3^2?

A

9.

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10
Q

Calculate x if x^2 = 16 + 9.

A

x = 5.

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11
Q

What is the formula for the Pythagorean theorem?

A

a^2 + b^2 = c^2.

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12
Q

If the lengths of the legs are a = 4 cm and b = 3 cm, what is c?

A

c = 5 cm.

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13
Q

What do the letters a, b, and c represent in the Pythagorean theorem?

A

a and b are the legs, c is the hypotenuse.

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14
Q

True or False: The hypotenuse of a right triangle is always the shortest side.

A

False.

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15
Q

If a right triangle has legs measuring 4 cm and 3 cm, what is the area?

A

Area = 6 cm².

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16
Q

How do you calculate the area of a right-angled triangle?

A

Area = (1/2) * base * height.

17
Q

What is the base of the triangle in this problem?

18
Q

What is the height of the triangle in this problem?

19
Q

If the hypotenuse is 5 cm, what is the relationship between the legs and the hypotenuse?

A

The legs must satisfy a^2 + b^2 = 5^2.

20
Q

Fill in the blank: The length of the hypotenuse can be found using the equation ___ = ___ + ___.

A

x^2, 4^2, 3^2.

21
Q

True or False: A right triangle can have two equal legs.

22
Q

What is the length of the hypotenuse in a right triangle with legs of 4 cm and 4 cm?

A

x = 4√2 cm.

23
Q

If one leg of a right triangle is doubled, what happens to the area?

A

The area doubles.

24
Q

What happens to the hypotenuse if both legs of a right triangle are increased by 1 cm?

A

It increases, but not necessarily by 2 cm.

25
How would you express the length of the hypotenuse in terms of the legs a and b?
c = √(a^2 + b^2).
26
What is the significance of the Pythagorean theorem in geometry?
It relates the lengths of the sides of a right triangle.