1. Find angle measures and use angles to classify triangles. Part I: Find the missing angle measure in each triangle. Show your work. (3 points, 1 point each)
TRIANGLE 1= 50 75
TRIANGLE 2= 60 30
TRIANGLE 3= 30 45

55, Acute angled scalene triangle

90, Right angled scalene triangle

105, Obtuse angled scalene triangle

Step-by-step explanation:

Let us learn the property of a triangle.

Let a triangle be .

Sum of all the three internal angles of a triangle is always equal to .

OR

Given that triangles have 2 angles. Let us suppose, the third angle be

1. Triangle 1: two angles are

All the angles are less than 90 and no two angles are equal so, it is acute angle scalene triangle. (No sides equal)

2. Triangle 1: two angles are

One angle is 90 and not two angles are equal so, right angled scalene triangle.(No sides equal)

3. Triangle 1: two angles are

One angle is more than 90 and not two angles are equal so, obtuse angled scalene triangle.(No sides equal)

So, the answers are:

55, Acute angled scalene triangle

90, Right angled scalene triangle

105, Obtuse angled scalene triangle