Which transformation will map an isosceles trapezoid onto itself? a. rotation by 180° about its center b. reflection across a diagonal c. reflection across a line joining the midpoints of the nonparallel sides d. rotation by 360 about its center

D. rotation by 360 about its center.

Step-by-step explanation:

We know that only rotation transformation maps isosceles trapezoid onto itself when we rotate it by 360° about its center.

The order of rotational symmetry is the number of times the figure maps onto itself during a rotation of 360°.

An  isosceles trapezoid has two congruent sides and two non-congruent parallel sides.

It maps onto itself after 1 complete rotation of 360°.

Rest of other options do not map an isosceles trapezoid onto itself.

i got 10.28 but that rounds up to 10.3

at least two

step-by-step explanation: