Find all the angles in the given figure using properties of angles
Answers
Answer:
30°, 60°, 90°
Step-by-step explanation:
It is given that the measures of the angles in the triangle are x, 2x and 90°
Sum of angles in a triangle = 180°
⇒ x + 2x + 90° = 180°
⇒ 3x = 180° - 90°
⇒ 3x = 90°
⇒ x = 90°/3
⇒ x = 30°
2x = 2(30°) = 60°
The measures of the angles in the triangle are 30°, 60°, and 90°.
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To find the angles in the figure given in the question.
First of all,
This is a right angle triangle. It is already given in the figure.
So ,
Let we can give names to each angle as ,
A , B , C.
Here , in the figure
Δ ABC is given where,
∠ A = 2x
∠ B = 90°
∠ C = x
We need to find ∠ A & ∠ C.
According to angle sum property,
Sum of the interior angles of a triangle = 180 °
In RtΔ ABC,
∠B = 90°
So ,
∠ A + ∠ B + ∠ C = 180°
∠ A + 90° + ∠ C = 180°
∠ A + ∠ C = 180 ° - 90 °
∠ A + ∠ C = 90°
Now, instead of ∠ A & ∠ C we can substitute 2x & x.
ie,
⇒ 2x + x = 90°
⇒ 3x = 90°
⇒ x = 30°
Then,
- ∠ A = 2x = 2 × 30°
- ∠A = 60°
- ∠ C = x = 30°
So the required answer for your question is;
∠ A = 60°
∠ B = 90°
∠ C = 30°
All Done !!☺