Question

Half of a circle is called _____________________ 7. Diameter is _______________ the radius II. Tick the correct answer: 1. Two rays with the common end point makes an _____________________ a. angle b. ray c. parallel line d. perpendicular line 2. Any part of a circle is called an __________________ a. radius b. arc c. chord d. circumference 3. All the radii of a circle are __________________ in length. a. parallel b. equal c. unequal d. perpendicular 4. The angle whose measure is exact 90° is called as _________________ a. Straight angle b. Right angle c. Obtuse angle d. Acute angle 5. The longest chord of the circle is ______________ a. Radius b. Diameter c. Arc d. Circumference II. Solve: 1. Find the diameter of the circle whose radius is 8m. 2. Find the radius of the circle whose diameter is 18cm. 3. Construct a circle of radius 4cm and name the following. a)Centre of the circle​

Answer 1

Answer

1)hemisphere

2)half,

1) Angle

2) circle is all points in the same plane that lie at an equal distance from a center point. ... A circle is the same as 360°. You can divide a circle into smaller portions. A part of a circle is called an arc and an arc

3)Step-by-step explanation: By the definition of a circle, any two radii have the same length. Since a diameter consists of two radii joined at their endpoints, every diameter has length equal to twice the radius. Hence, all radii of a circle are equal.

4)right angles

Angles that are 90 degrees (θ = 90°) are right angles. Angles that are 180 degrees (θ = 180°) are known as straight angles.

Explanation:

5)diameter

A chord that passes through the center of a circle is called a diameter and is the longest chord of that specific circle.

1)d=2r

=2×8

=16cm

2)Using the formula

d=2r

Solving forr

r=d

2=18

2=9cm

3)The tangent to a circle is perpendicular to the radius at the point of tangency. Take a measure of 4 cm by the compass on a scale and draw a circle with it. By this we made a circle with radius=4 cm. ... The perpendicular line we draw is the required tangent to the circle

Answer 2

Answer:

1. semicircle
2. double
3. ray
4. circumference
5. equal
6. right angle
7. diameter