Claire is designing a banner that will hang in her classroom. the length of one diagonal of the banner is 48 inches, and the sides are 25 inches long. is the banner a square?

it is not a square because opposite angles are not congruent.
it is not a square because the angles at the vertices are not right angles.
it is a square because all the sides are congruent.
it is a square because the diagonals are perpendicular.

answer: b is the right answer. it is not a square because the angles at the vertices are not right angles.

step-by-step explanation:

if claire's banner is a square then its internal angle must be 90°.

⇒ square must divide into two right triangles with base and perpendicular is equals to the side =25 in. and hypotenuse = diagonal of square.

by pythagoras theorem of right triangles

which is not true.

⇒ it is not a right triangle .

therefore the internal angle is not 90°.

thus,it is not a square because the angles at the vertices are not right angles.

if she was to only spend a dollar she can get 1lb

step-by-step explanation:

60°

step-by-step explanation:

the measure angle of c in an isosceles triangle abc is 60° because in isosceles triangle,the measures of all the angles is 60°.