Top Answer

The internal angles of a regular pentagon are 108°.

(If you need proof I like to use external angles, rather than memorizing an internal angle formula: 360°/5 = 72°

=> internal angle = 180°-72° = 108°)

Drawing a line from B to E will form an obtuse Isosceles triangle with A forming the obtuse angle. Angle A is not affected, and remains 108°.

The sum of all the angles of a triangle are equal to 180°, and our triangle is isosceles, so half the remaining amount (after subtracting angle A) is equal to the two acute angles (ABE and BEA).

1/2(180°-108° = 72°)

= 36°

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0A regular pentagon can always be drawn through any two given points with those two points as any two vertices of the pentagon. (Diagonals of a pentagon connect two vertices which are not next to each other.)

In a regular pentagon, the lines of symmetry are drawn from each vertex to the midpoint of the edge directly opposite the vertex, so there are five in all.

First you draw a square. A square has 4 right angles. If you draw a line above one of the right angles and rub out the angle which you have drawn a line above you have a pentagon with 3 right angles.

Three

The answer will depend on the relative positions of the points.

A dodecagon is a regular polygon that can be drawn using rotations. These are normally drawn in a Geometer's Sketchpad.

isometric views are drawn at 30 degrees

Yes. The side lengths for angle measures don't count.

A trapezoid can be drawn with one right angle.

45o

This depends if it is an animated movie, which has been been drawn and animated on a computer, then yes.But if it has been drawn as 2D as a flat image, from a downwards angle, then no.If it has been drawn from an angle then it is slightly possible.

In first angle auto graphic projection the planed, view is drawn exactly below the front elevation. What is viewed from the left is drawn from the right side of the front, it is drawn in the 1st angle and 3rd angle.

A 5-sided polygon is called a pentagon. You can draw up to 5 diagonals in a pentagon.

The square drawn in a right angle simply is to indicate that the angle is, indeed, 90 degrees.

A regular pentagon is convex. By taking a regular pentagon and shortening or lengthening one or more sides, an infinite number of possible convex pentagons can be created. A convex polygon is defined as a polygon such that all internal angles are less than or equal to 180 degrees, and a line segment drawn between any two vertices remains inside the polygon. It is possible to have non-convex (concave) pentagons; there are infinite number possible ways to do this, too.

Basically its just where you position the views of the main object, in first angle projection, if you view the object from the left, the view is drawn to the right of the object, in third angle projection, its drawn on the viewing side.

60

right (apex)

An angle bisector.

Cross-hatch lines used in Architectural drawings are normally drawn at a 45 degree angle.

It has usually a red box at the vertex and is called a "right angle."

Yes it can.

20 triangles will fit into a 22 sided polygon whose interior angles add up to 3600 degrees

normal

Whether or not the line bisecting it has been drawn, it's true that every angle can be bisected.

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