Need Help With Two Questions ASAP Plz, will mark brainliest

1.A tabletop in the shape of a trapezoid has an area of 4,940 square centimeters. Its longer base measures 123 centimeters, and the shorter base is 85 centimeters. What is the height?

2.How can you find the area of an irregular polygon using area formulas?

First, break the irregular polygon into shapes whose 1. you can find using familiar formulas. The 2. of these areas is the area of the polygon.

Fill in the blanks
1.
Sizes
Perimeters
Areas
Averages
Distances
2.
Product
Sum
Average
Difference

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.

we would never know : d

step-by-step explanation:

29 is x=.7

30 is y=3.375 or 3 and 3/8

the cross section of an object is the shape you get when you cut straight through an object.

thus the cross section of the human hair is a circle. hence the cross sectional area is the area of a circle and area of circle is :

a = 3.14 × r²

we are given that the average width of human hair is = 4 × (1 / 10³) cm.

so the diameter of the circle is = 4 × (1 / 10³) cm.

∴ radius r = (diameter/2) = 2 × (1/10³) cm

now area a = 3.14 × (2 × (1/10³))² cm²

scientific notation is a standard way of writing very large and very small numbers so that they’re easier to both compare and use in computations. to write in scientific notation, follow the form

n × 10 ᵃ

where n is a number between 1 and 10, but not 10 itself, and a is an integer (positive or negative number).

so area can be rewritten in scientific notation as :

⇒ 3.14 × 4 × (1/10⁶)

⇒ 12.56 × 10 ⁻⁶ cm²

⇒1.256 × 10⁻⁷ cm²