# It's possible to build a triangle with side lengths of 7 6 and 9 true or false?

true

### How can you determine whether a triangle is a right triangle if you only have the lengths of its three sides?

The pathagoren theorm states that a2+ b2 = c2. If you put your lenghts into the equation and it comes out true (100=100), then the triangle is a right trianlge. If it is a false equation (100=30), then it is not a right triangle. Where a = lenght of leg 1, b = lenght of leg 2, and c = lenght of hypotenuse.

### Is a right triangle acute true or false?

False ------------------------------------ An acute triangle is one in which all angles are acute angles. An acute angle is less than 90Â°. A right angle is 90Â°, which is equal to 90Â° not less than 90Â° Therefore all the angles of a right triangle are not all acute Thus a right triangle is not an acute triangle.

### All equilateral triangles are also isosceles triangles?

True or False, depending on your definition of isosceles triangles! Actually, whether your answer is true or false depends upon your definition of an isosceles triangle. Some mathematicians define an isosceles triangle as one with at least two sides, while others define an isosceles triangle as one with exactly two sides. The latter definition is the more generally accepted one. Since an equilateral triangle has three, not exactly two congruent sides, people using the second…