An exterior angle of triangle of measure 120 degree and one of its int...
Let the other interior opposite angle =x
here,x+75=120( by exterior angle property)
x=120-75
Hence,x=45
The measure of other interior opposite angle is 45degree...
An exterior angle of triangle of measure 120 degree and one of its int...
Given:
- The exterior angle of a triangle measures 120 degrees.
- One of the interior opposite angles measures 75 degrees.
To find:
- The measure of the other interior opposite angle.
Solution:
In a triangle, the sum of all interior angles is always 180 degrees. We can use this property to find the measure of the other interior opposite angle.
Step 1: Find the measure of the exterior angle
- An exterior angle is formed by extending one side of a triangle.
- The sum of an exterior angle and its corresponding interior angle is always 180 degrees.
- In this case, the measure of the exterior angle is given as 120 degrees.
- So, the measure of the corresponding interior angle is 180 - 120 = 60 degrees.
Step 2: Find the measure of the other interior opposite angle
- We are given that one of the interior opposite angles measures 75 degrees.
- Let's assume the measure of the other interior opposite angle as 'x' degrees.
- According to the property of the sum of interior angles of a triangle, we have the equation:
75 + 60 + x = 180
- Simplifying the equation, we have:
135 + x = 180
x = 180 - 135
x = 45 degrees
Answer:
- The measure of the other interior opposite angle is 45 degrees.
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