Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
primary 5 | Maths
| Angles & Geometry
One Answer Below
Anyone can contribute an answer, even non-tutors.
How to do
Date Posted: 3 years ago
Views: 272
In the small white triangle of the second figure, one of the angles is actually a corner angle of the rectangular paper (90°).
That angle appears to be acute but its is actually a right angle (the diagram is not drawn accurately)
You've already found the 72°.
Since angle sum of a triangle is 180°,
∠p = 180° - 72° - 90° = 18°
That angle appears to be acute but its is actually a right angle (the diagram is not drawn accurately)
You've already found the 72°.
Since angle sum of a triangle is 180°,
∠p = 180° - 72° - 90° = 18°
See 1 Answer
180-90-72=18
360 Tutoring Program