Bianca calculated the height of the equilateral triangle with side lengths of 10. then, she used the formula for area of a triangle to approximate its area, as shown below. calculate the area of the equilateral triangle using the formula for area of a regular polygon, and compare it to bianca’s answer. the apothem, rounded to the nearest tenth, is . the perimeter of the equilateral triangle is . therefore, the area of the equilateral triangle , or approximately 43.5 units2. the calculated areas

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.

In a quadratic function of the form ax^2+bx+c, which of the following is not true? a. the y-intercept is c. b. if a is positive, the parabola opens up. c. the vertex has an x-coordinate of -b/2a. d. the axis of symmetry is the line y=-b/2a.

Explain whether this dilation is an enlargement or a reduction, and how you know.