Lesson Worksheet: Angle Sum of a Triangle Mathematics • 8th Grade
In this worksheet, we will practice finding a missing angle in a triangle given the two other angles.
Q3:
Complete the sentence: The measure of a straight angle is the sum of the measures of the interior angles of a triangle.
- Agreater than
- Bless than
- Cequal to
Q4:
What is the sum of the measures of the two acute angles in a right-angled triangle?
Q5:
Calculate the value of .
Q6:
In triangle , and . What is ?
Q7:
Find .
Q8:
The given design is carved on a wooden board. If is a right angle, determine the values of , , and .
- A, ,
- B, ,
- C, ,
- D, ,
Q10:
In triangle , and . Find .
Q11:
In , . Determine .
Q12:
In the figure below, given that is a rectangle, determine .
Q13:
If is a triangle in which and . Calculate the measures of angles , , and .
- A, ,
- B, ,
- C, ,
- D, ,
Q14:
In the triangle , , , and . Find the measure of each angle.
- A, ,
- B, ,
- C, ,
- D, ,
- E, ,
Q15:
Given that is a triangle in which , , and , determine .
Q16:
Find the measure of each angle in the triangle below.
- A, ,
- B, ,
- C, ,
- D, ,
Q17:
The figure shows a rectangle and a square . What is ?
Q18:
The sum of the measures of the angles of a triangle is . In a right triangle, what is the sum of the measures of the two acute angles?
Q19:
In , . If is an altitude of , find .
Q20:
If the ratio between the measures of the angles of a triangle is , determine the measures of the angles.
- A, ,
- B, ,
- C, ,
- D, ,
- E, ,
Q21:
Suppose that in the figure, and . Determine these two angles.
- A,
- B,
- C,
- D,
- E,
Q22:
The measures of the angles in a triangle are in a ratio of . Work out the measures of these angles.
- A, ,
- B, ,
- C, ,
- D, ,
- E, ,
Q23:
Is the measure of a straight angle equal to the sum of the measures of the angles of a triangle?
- ANo
- BYes
Q24:
is a triangle in which bisects . If and , find .
Q25:
What is ?