Mathematics

# If sum of two angles is $\displaystyle { 90 }^{ o }$. They will be:

Complementary angles

##### SOLUTION
If the sum of two angles is $\displaystyle { 90 }^{ o }$, then the angles are called Complementary angles.
If the sum of two angles is $\displaystyle { 180 }^{ o }$, then the angles are called Supplementary angles.
When two lines are crossed by another line, then the angles in matching corners are called Corresponding angles.
A linear pair of angles is formed when two lines intersect. Two angles are said to be linear if they are adjacent angles formed by two intersecting lines. The measure of a straight angle is $180˚$, so a linear pair of angles must add up to $180˚$.

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Single Correct Medium Published on 09th 09, 2020
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#### Realted Questions

Q1 One Word Medium
Measures of some angle is given below. Find the measures of its complementary angle.
if the angle is $\displaystyle \frac{2}{3}$rd of a right angle

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020

Q2 Single Correct Medium
If the angle x and y are equal, then find the value of x and y.
• A. $\displaystyle x=y={ 55 }^{ o }$
• B. $\displaystyle x=y={ 60 }^{ o }$
• C. $\displaystyle x=y={ 90 }^{ o }$
• D. $\displaystyle x=y={ 45 }^{ o }$

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 23rd 09, 2020

Q3 Subjective Medium
In Fig. 7.12, if AB ||DC and E is the mid - point of side AC, then prove that E is the mid-point of side BD.

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020

Q4 Single Correct Medium
If two lines intersect such that four vertical angles are equal, then each angle is:
• A. $45^{\circ}$
• B. $100^{\circ}$
• C. $180^{\circ}$
• D. $90^{\circ}$

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020

Q5 Subjective Medium
Read the following two statements which are taken as axioms:
(i) If two lines intersect each other, then the vertically opposite angles are not equal.
(ii) If a ray stands on a line, then the sum of two adjacent angles so formed is equal to $180^0$.