U8.M17 Flashcardizz

Front

What is the formula for the area of a circle?

Back

The area of a circle is given by the formula: A = πr², where r is the radius of the circle.

Front

How do you find the radius from the diameter of a circle?

Back

The radius is half of the diameter. If the diameter is d, then the radius r = d/2.

Front

Calculate the area of a circle with a diameter of 22 yards.

Back

The radius is 11 yards. Area = π(11)² ≈ 380.13 yd².

Front

What is a sector of a circle?

Back

A sector is a portion of a circle enclosed by two radii and the arc between them.

Front

How do you calculate the area of a sector?

Back

The area of a sector is given by the formula: A = (θ/360) × πr², where θ is the angle in degrees and r is the radius.

Front

Find the area of a shaded sector with a radius of 10 m and an angle of 60 degrees.

Back

Area = (60/360) × π(10)² ≈ 17.45 m².

Front

What is the relationship between angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180°.

Front

If one angle in a triangle is 40°, what is the sum of the other two angles?

Back

The sum of the other two angles is 180° - 40° = 140°.

Front

What is the value of x if the angle measures 32° in a triangle?

Back

x can be found using the triangle angle sum property, depending on the other angles.

Front

What is the formula for the area of a circle with radius 7 m?

Back

Area = π(7)² ≈ 153.94 m².