Respuesta :
Angles are undefined terms in plane geometry.
The true statements are:
- 4. [tex]\angle A = 158[/tex].
- 5. [tex]\angle Q =90[/tex]
- 6. [tex]\angle U[/tex] is an obtuse angle
- 7. Its supplement must be an acute angle
- 8. See attachment
Question 4
The first statement is represented as:
[tex]\angle A \cong \angle B[/tex]
Supplement of [tex]\angle B = 22^o[/tex]
[tex]\angle A \cong \angle B[/tex] means that A and B are congruent.
The supplementary of A and B would be the same
The measure of A is then calculated as:
[tex]\angle A + 22 = 180[/tex]
Subtract 22 from both sides
[tex]\angle A = 180 -22[/tex]
[tex]\angle A = 158[/tex]
Question 5
If LP and LQ are linear pairs, then:
[tex]LP + LQ = 90[/tex]
So:
[tex]\angle Q + LP + LQ = 180[/tex]
Substitute [tex]LP + LQ = 90[/tex]
[tex]\angle Q + 90 = 180[/tex]
Subtract 90 from both sides
[tex]\angle Q =- 90 + 180[/tex]
[tex]\angle Q =90[/tex]
Question 6
[tex]\angle S + \angle T = 90[/tex] --- S and T are supplementary
[tex]\angle T + \angle U = 180[/tex] --- T and U are complementary
Subtract both equations
[tex]\angle S + \angle T - \angle T - \angle U = 90 - 180[/tex]
[tex]\angle S - \angle U = -90[/tex]
Make U the subject
[tex]\angle U = 90 + \angle S[/tex]
This means that:
[tex]\angle U > 90[/tex]
Hence, [tex]\angle U[/tex] is an obtuse angle
Question 7
Obtuse angles are greater than 90 degrees but less than 180.
This means that their supplement must be an acute angle (i.e. less than 90)
Question 8
See attachment
Read more about angles at:
https://brainly.com/question/13954458
