Answer:
30
Step-by-step explanation:
The width is 20 and the length is 30.
20+30+20+30=100
30% of $15 is $4.50,hope this helps!
Answer
adding 2
Step-by-step explanation:
In Euclidean plane geometry, a quadrilateral is a polygon with four edges (or sides) and four vertices or corners. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes tetragon for consistency with pentagon (5-sided), hexagon (6-sided) and so on.
Quadrilateral
Some types of quadrilaterals
Edges and vertices4Schläfli symbol{4} (for square)Areavarious methods;
see belowInternal angle (degrees)90° (for square and rectangle)
The origin of the word "quadrilateral" is the two Latin words quadri, a variant of four, and latus, meaning "side".
Quadrilaterals are simple (not self-intersecting) or complex (self-intersecting), also called crossed. Simple quadrilaterals are either convex or concave.
The interior angles of a simple (and planar) quadrilateral ABCD add up to 360 degrees of arc, that is
{\displaystyle \angle A+\angle B+\angle C+\angle D=360^{\circ }.}
This is a special case of the n-gon interior angle sum formula (n − 2) × 180°.
All non-self-crossing quadrilaterals tile the plane by repeated rotation around the midpoints of their edges.
