Aparallelogram is dilated by a scale factor of three.

which of the following properties are unchanged?

i. the perimeter and area
ii. the measure of the angles
iii. the lengths of the sides
a.
iii
b.
i, ii, and iii
c.
ii
d.
i and ii

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Which of the following is true about the graph of f(x)=7^x. select all that apply. a= it intercepts the x axis b=it intercepts both axis c=it intercepts neither d=it intercepts the y axis

Can someone me with this problem i don't understand i need