Angle Calculator - Isosceles Triangles - Measure Angles and Side Lengths by entering 2 known values
Enter Side Lengths and either top Angle or Base length to calculate all other side lengths, angles, triangle height and area.
Top Angle
View page on Phone via QR Code
?
Create and Print Full Scale PDFs with diagrams on this page (templates)
?
On calculators with Slider Controls, drag slider tab to get close, then use keyboard cursor keys ◄ ► to fine tune.
Or Right Click
the slider and use the up down arrows that appear to adjust - Right click again to go back to the slider.
Fine Tune ◄►
PRINTING HELP
SVG to G-Code JsCut
? Copy all diagrams on this page to bottom of page - Make multiple copies to Print or Compare Results Compare Diagrams
Help Print this Page
Share ↔ X Margins
Directory Contact Us
🖩Calculator To Top ↑
Built something using this site?
Please Send Photos!
See Examples
If you've benefited from this free service please consider helping us support:
Inch or Metric?
Click
for Navigation.
The main Navigation tabs are Metric - inputs in millimeters (mm). Directly under each main Metric tab is a smaller 'Inch' tab for the Feet and Inch version.
Drop Down Menus have Metric for Metric Versions.
Please help promote this free service
Tell a Friend!
Calculator Apps - Construction - Home Improvement - Remodeling - Renovation - Craft - Templates - Woodwork - Metalwork
⚠️
All calculators on this site are geometric only.
Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.
Disclaimer | Privacy & Cookie Policy
Copyright © 2001 - 2022 Greg Tarrant - blocklayer.com
a=3 b=4 c=5 ... triangle calc by three sides a,b,c.
B=45 c=10 a=9 ... triangle calc by two sides a,c and included angle B.
A=25 C=80
b=22
A=35 C=26 a=10
a=3 C=90 c=5 ... how to enter right-angled triangle.
a=3 β=25 γ=45 ... triangle calc if we know the side and two
angles.
a=3 β=25 T=12 ... triangle calc, if know side, angle, and area of a triangle.
T=2.5 c=2 b=4 ... find side a if know sides b, c, and area of triangle T.
ma=1 b=2.5 c=2 ... calculation
of the triangle if we know one median and any two sides.
ma=1 mb=2.5 mc=2 ... triangle calc by three medians.
ha=220, hb=165 hc=132 ... triangle calc by three heights.
a=7 β=40
mc=5 ... triangle calc by one side, one angle, and one median.
a:b:c=2:3:4 T=2.5 ... a triangle where the known side ratio, and its area.
A:B:C=1:4:5 a=2 ... calculating triangle if we know the ratio of the internal angles and one side.
What do the symbols mean?
a, b, c ... sides BC, AC, AB
A, B, C or α, β, γ ... internal angles
ha, hb, hc ... heights
ma, mb, mc ... medians
T ... area
p ... perimeter
s ... semiperimeter
Angles of a triangle
[1-5] /5 | Disp-Num |
[1] 2021/03/05 18:13 40 years old level / An engineer / Useful /
Purpose of useAngle for miter cut.[2] 2019/10/01 21:30 Under 20 years old / Elementary school/ Junior high-school student / Useful /
Purpose of usehomework help[3] 2019/05/29 12:35 50 years old level / Self-employed people / Useful /
Purpose of useimprove the speed and accuracy of equipment setup.[4] 2019/04/04 14:47 Under 20 years old / Elementary school/ Junior high-school student / A little /
Purpose of useAn angle measures 34° more than the measure of a supplementary angle. What is the measure of each angle?i need answer
[5] 2009/05/29 00:26 Under 20 / A junior high student / A little /
Comment/Request There is a right triangle, and the length of the hypotenuse is 8.5cm. What are the two sides?!Thank you for your questionnaire.
Sending completion
To improve this 'Angles of a triangle Calculator', please fill in questionnaire.