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➷ At the top, the word is quadrilaterals

At the second one, the word is parallelograms

For the third layer on the left, the word is rectangles

For the third layer on the right, the word is rhombuses

Explanation:

a square is a rectangle too, and a rhombus is a shape with 4 equal sides.

Rhombuses and rectangles are parallelograms,

and a parallelogram is also a quadrilaterals.

In fact, all the shapes in the chart are all quadrilaterals.

✽

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TROLLER

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116