Triangle e d f has sides that are of varying lengths. side e d has a length of 4 and side e f has a length of 9.
which statements about the diagram are true? select three options.

d e + e f greater-than d f
triangle d e f is an isosceles triangle.
5 less-than d f less-than 13
d e + d f less-than e f
triangle d e f is a scalene triangle.

D E + E F greater-than D F

5 less-than D F less-than 13

Triangle D E F is a scalene triangle

Step-by-step explanation:

we know that

The Triangle Inequality Theorem states that the sum of any 2 sides of a triangle must be greater than the measure of the third side

we have the triangle EDF

where

Applying the triangle inequality theorem

1)

2)

so

The length of DF is the interval -----> (5,13)

The triangle DEF is a scalene triangle (the three length sides are different)

therefore

The statements that are true are

D E + E F greater-than D F

5 less-than D F less-than 13

Triangle D E F is a scalene triangle

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discount would be 35% off

step-by-step explanation:

363 square inches

step-by-step explanation:

surface area of a pyramid is b + 1/2ph

b is the area of the base: 11 x 11 = 121

p is the perimeter of the base: 11 + 11 + 11 + 11 = 44

h is the height of the pyramid: 11

121 + 1/2(44)(11)

121 + 242

363