Triangle ABE is isosceles / Given
AB congruent to AE / Def isosceles
angle ABE congruent to angle AEB / Property of isosceles triangles
angle ABD congruent to angle AEC / Subst different name for same angles
BD congruent to EC / Given
triange ABD congruent to triange AEC / Side Angle Side
Step-by-step explanation:
the numbers are mixed can u plz ss it if u have it multiple choice or on a book
Answer:
The total surface area is 896 
Step-by-step explanation:
<em>The square pyramid is a solid with square base and symmetric 4 triangular faces.</em>
Given that the square base is 14 m and height is 24 m.
The apex of pyramid, center of square and center of any edge of square make a right angled triangle.
Let that height if triangular face be "x".
by pythagoras theorm , 
x = 25 m
the area of square base is 
the area of each triangular side is <em>
</em>
such are 4 triangles, thus 
Thus the total surface area is 196 + 700 = 896 