Definition of Line :
A line segment is a section of a line bounded by two points or connecting two points.
Types of lines :
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Line segment :
A line segment is a collection of finite points which has a definite length. It has a start point and an endpoint. It is the shortest distance between two points that can be measured.
Types of angles
Problem 1 :
The ray opposite to KN is _____
Solution :
Opposite rays :
Two rays are opposite rays, by definition, if
1) They have the same endpoint, and
2) Their union is a line.
By observing the above diagram,
The ray opposite to KN is KJ.
Problem 2 :
Another name for LM is _____
Solution :
By observing the above diagram,
Another name for LM is LN.
Problem 3 :
The coordinate of L is _____
Solution :
By observing the above diagram,
The coordinate of L is 3.
Problem 4 :
The length of LN is ____
Solution :
The length of LN is 4.
Problem 5 :
MJ = _____
Solution :
MJ = 9
Problem 6 :
A segment congruent to KM is _____
Solution :
By observing the previous question diagram,
Congruent is same shape and same size.
So, a segment congruent to KM is LN.
Problem 7 :
The point on LM whose distance from L is 2 is _____
Solution :
By observing the previous question diagram,
The point on LM whose distance from L is 2 is M.
Problem 8 :
The point on LK whose distance from L is 2 is _____
Solution :
By observing the previous question diagram,
The distance between L and M is 2.
Refer to the diagram and classify each angle as acute, right, obtuse, or straight.
Problem 1 :
∠A ____
Solution :
By observing the diagram.
∠A is acute angle. (30º)
Because, acute angle is greater than 0º and less than 90º is called acute angle.
Problem 2 :
∠ABC ____
Solution :
By observing the diagram.
∠ABC is obtuse angle.
∠ABC = 60 + 40
= 100 (more than 90)
Because, obtuse angle is greater than 90º and less than 180º is called obtuse angle.
Problem 3 :
∠BDC ____
Solution :
By observing the diagram.
∠BDC is right angle (90º).
Because, right angle is 90º.
Problem 4 :
∠ADC _____
Solution :
By observing the diagram.
∠ADC is straight angle (180º).
Exactly 180º is called straight angle.
May 21, 24 08:51 PM
May 21, 24 08:51 AM
May 20, 24 10:45 PM