Answer:
C. Acute.
E. Scalene
Step-by-step explanation:
We have been given a triangle with angles 51, 59 and 70 degrees. We are asked to classify the given triangle.
A. Obtuse.
Since no angle of our given triangle is greater than 90 degrees, therefore, it is not an obtuse triangle.
B. Isosceles
Since two angles of our given triangle are not equal, therefore, it is not an isosceles triangle.
C. Acute.
Since all angles of given triangle are less than 90 degrees, therefore, our given triangle is an acute triangle.
D. Equilateral.
Since all angles of given triangle are not 60 degrees, therefore, our given triangle is an equilateral triangle.
E. Scalene
Since all sides of given triangle are not equal, therefore, our given triangle is a scalene triangle.
F. Right
Our triangle has not a 90 degree angle, therefore, it is not a right triangle.
