Correct option is A
Given:
Two angles of triangle = 60° and 80°
Concept used:
Sum of interior angles of a triangle = 180°
Solution:
Third angle of the triangle = 180° - (60° + 80°)
= 180° - 140°
= 40°
Thus, correct option is (a)
Question
If two angles of a triangle measure and respectively, then the measure of the third angle of this triangle is:
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- 1)
Which of the following is not a pythagorian triplet?
- 2)
In △ABC, BD ⟂ AC at D and ∠DBC = 14°. E is a point on BC such that ∠CAE = 75°. What is the measure of ∠AEB?
- 3)
If the angles of a triangle are 4x°, 3x°, 2x° then 1/4x° =
- 4)
If the sides of a triangle are in the ratio of 1:√3:2, then what is the ratio of its corresponding angles ?
- 5)
In △ABC, AB = AC = 12 cm, BC = 5 cm and D is a point on AC such that DB = BC. What is the measure of CD?
- 6)
In a triangle ABC, medians AD and BE intersect at G. If the length of median AD is 12 cm, what is the length of the segment AG?
- 7)
In △ABC, BD ⟂ AC at D and ∠DBC = 25°. E is a point on BC such that ∠CAE = 80°. What is the measure of ∠AEB?
- 8)
The number of possible triangles with any three of the lengths 1.2 cm, 4.2 cm, 5.9 cm, and 8.1 cm is:
- 9)
In △ABC, BD ⟂ AC at D and ∠DBC = 22°. E is a point on BC such that ∠CAE = 36°. What is the measure of ∠AEB?
- 10)
In △LMN, medians MX and NY are perpendicular to each other and intersect at Z. If MX = 20 cm and NY = 30 cm, what is the area of △LMN (in cm²)?
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Similar Questions
- 1)
Which of the following is not a pythagorian triplet?
- 2)
In △ABC, BD ⟂ AC at D and ∠DBC = 14°. E is a point on BC such that ∠CAE = 75°. What is the measure of ∠AEB?
- 3)
If the angles of a triangle are 4x°, 3x°, 2x° then 1/4x° =
- 4)
If the sides of a triangle are in the ratio of 1:√3:2, then what is the ratio of its corresponding angles ?
- 5)
In △ABC, AB = AC = 12 cm, BC = 5 cm and D is a point on AC such that DB = BC. What is the measure of CD?
- 6)
In a triangle ABC, medians AD and BE intersect at G. If the length of median AD is 12 cm, what is the length of the segment AG?
- 7)
In △ABC, BD ⟂ AC at D and ∠DBC = 25°. E is a point on BC such that ∠CAE = 80°. What is the measure of ∠AEB?
- 8)
The number of possible triangles with any three of the lengths 1.2 cm, 4.2 cm, 5.9 cm, and 8.1 cm is:
- 9)
In △ABC, BD ⟂ AC at D and ∠DBC = 22°. E is a point on BC such that ∠CAE = 36°. What is the measure of ∠AEB?
- 10)
In △LMN, medians MX and NY are perpendicular to each other and intersect at Z. If MX = 20 cm and NY = 30 cm, what is the area of △LMN (in cm²)?
