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Alina [70]
3 years ago
14

How can u describe how to find area and perimeter in your classroom

Mathematics
1 answer:
julia-pushkina [17]3 years ago
7 0
The area formula depends on the shape your doing. for Ex:(rectangle, A=lenght*height) and Ex2: (trapazoid, A= 1/2h(b1 +b2)) .......In perimeter you just add up all the sides no matter what shape. Except circle is (C= 2(pie)r)
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Obtuse is to more than 90° as reflex is to​
Simora [160]

9514 1404 393

Answer:

  >180° (more than 180°)

Step-by-step explanation:

Angles are classified as ...

  • acute: < 90°
  • right: = 90°
  • obtuse: > 90°
  • straight/linear: = 180°
  • reflex: > 180°

It seems that we're looking at definitions:

  obtuse : >90° :: reflex : >180°

7 0
2 years ago
Find the missing side of each triangle using the pythagorean theorem
Aliun [14]

Answer:

10km

Step-by-step explanation:

6^2+8^2=100

sqrt 100=10

6 0
2 years ago
What is the value of n 9 times 27+2 times31-28
Kay [80]
9•27+2•31-28= ? Is that what you are asking?
8 0
3 years ago
Find the sum of the first 90 terms of the sequence -4,-1,2,5,8
telo118 [61]

Answer:

1655

Step-by-step explanation:

Note the common difference d between consecutive terms of the sequence

d = - 1 - (- 4) = 2 - (- 1) = 5 - 2 = 8 - 5 = 3

This indicates the sequence is arithmetic with sum to n terms

S_{n} = \frac{n}{2} [ 2a₁ + (n - 1)d ]

Here a₁ = - 4, d = 3 and n = 90, thus

S_{90} = \frac{90}{2} [ (2 × - 4) + (89 × 3) ] = 45(- 8 + 267) = 45 × 259 = 1655

4 0
3 years ago
A scale map says that 1 cm represents 10 km. What distance on the map (in centimeters) represents an actual distance of 360 km?
castortr0y [4]

Answer:

36 cm

Step-by-step explanation:

1cm = 10 km

360km/10km=36

1x36=36

8 0
3 years ago
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