1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sonbull [250]
3 years ago
13

All parallelograms are rectangles. true or false

Mathematics
1 answer:
Marizza181 [45]3 years ago
6 0

That's false.  Not all parallelograms are rectangles, only some of them are. 
If a parallelogram wants to be a rectangle, then it has to agree to have a
right angle (90 degrees) at one corner.


(I know, I know.  Rectangles have right angles at ALL four corners. 
But if a parallelogram has one right angle AND it's still a parallelogram,
then it turns out that all four of its angles are right angles.  So if you tell
a parallelogram that one of its angles has to be a right angle, and it wants
to still be a parallelogram, then it must turn into a rectangle.)  


You might be interested in
I REALLY NEED SOME HELP! I CANT FAIL THIS!! PLEASE!!
Anit [1.1K]

Answer:

1: D

2: B

Step-by-step explanation:

7 0
2 years ago
More math help please im lazy ._.
FinnZ [79.3K]

there are no real square roots of 25,36

3 0
3 years ago
The object shown is made of glass. What is it called?
insens350 [35]
The answer is : Prism

hope this helps !
7 0
3 years ago
Read 2 more answers
Vector bought 15.6 pounds of paintballs. All together, the balls cost $35.99.
olga2289 [7]

Answer:

20.39

Step-by-step explanation:

35.99 – 15.6 = 20.39

5 0
3 years ago
Hello can someone help me simplify 4) and 5)? Thank you and please include steps :)
Leni [432]
Alrighty

remember some rules
(ab)^c=(a^c)(b^c)
and
x^{-m}=\frac{1}{x^m}
and
x^0=1 for all real values of x
and
(a^b)^c=a^{bc}
and
(\frac{a}{b})^c=\frac{a^c}{b^c}
and
(a/b)/(c/d)=(ad)/(bc)
and
(a^b)(a^c)=a^{b+c}
and
\frac{a^m}{a^n}=a^{m-n}
and don't forget pemdas
example: -x^m=-1(x^m) but (-x)^m=(-1)^m(x^m)

so

4.
(\frac{c^{-2}}{2})^{-2}=

\frac{(c^{-2})^{-2}}{2^{-2}}=

\frac{c^4}{\frac{1}{2^2}}=

\frac{c^4}{\frac{1}{4}}=

4c^4



5.

\frac{(-a)^4bc^5}{-a^2b^{-3}c^0}=

\frac{(-1)^4(a)^4bc^5}{-1(a^2)(\frac{1}{b^3}(1)}=

\frac{(1)a^4bc^5}{\frac{(-1)(a^2)}{b^3}}=

\frac{(a^4bc^5)b^3}{(-1)(a^2)}=

\frac{-a^4b^4c^5}{a^2}=

-a^2b^4c^5
3 0
3 years ago
Other questions:
  • You buy a new car for $30,000. It depreciates (decreases in value) 10% every year. In your notes, complete the table below. What
    15·1 answer
  • Solve for x. −12 = − 3/4 x A) 6 B) 8 C) 12 D) 16
    11·2 answers
  • A gardener will use up to 250 square feet for planting flowers and vegetables. He wants the area used for flowers to be at least
    14·1 answer
  • 17 = X + 3 HELPPPP FAST
    14·2 answers
  • The legs of a 45-45-90 triangle have a length of 8 units. What is the length of one of its hypotenuse?
    12·1 answer
  • Solve each equation by factoring ⁉️ANSWER THIS IN 3 MINS FOR A BRAINLIEST ⁉️
    12·1 answer
  • Last one need help pls
    15·1 answer
  • You fitted a regression model on the height of a particular pine tree, after 20 years of growth, as a function of the elevation
    13·1 answer
  • Emma is travelling to the store 25 miles away from her house. On Emma's map, her house and the store are 5 inches apart. What is
    12·1 answer
  • You have discovered another alien. Find the correct rescue path before answering this question. Which statements are true about
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!